How to match a compressor with an HVLP paint gun

[ricohman]

Re: HVLP and paint additives

Re: HVLP and paint additives

You cannot smell isocyanates and a mask without eye protection from isocyanates is far from ideal as your eyes absorb this readily.
There currently are no respirators sold that specify protection against isocyanates. I have used 3M face masks in the past and 3M does not list them as proper PPE for iso's.
Full mask with forced fresh air is the proper gear. Not to mention protecting your skin.

 

[ondarvr]

Re: HVLP and paint additives

Re: HVLP and paint additives

Your compressor will work fine for a small job like this, I have several compressors and normally use a small one. This isn't the side of a yacht or house, it's a small boat, you won't have the trigger pulled for long periods of time and can stop easily and frequently if needed and still keep a wet edge. Is bigger better....most of the time yes, but unless you plan to do more painting of large items in the future I wouldn't bother to buy a new bigger one.

 

[Jonboat2Bassboat]

Re: HVLP and paint additives

Re: HVLP and paint additives

Thanks for the input. The 20 gal compressor that is matched with the HVLP spray gun worked great! Just primed the boat yesterday and put a second primer coat on today. No problem waiting for compressor to recover. Had problems with the first coat but mostly because the paint was not thinned enough to spray. After thinning with 25% mineral spirits (Rustoleum recommended 5% max) priming went much better. Took all of 15 min to put second coat of primer on today and did not have to stop once. Gun is matched to compressor for 70% duty cycle but the compressor recovers fast enough for a 59% duty cycle.

Plan to paint with X-O Rust the first good paint day available. Paint outdoors but store the boat in the garage while paint cures. Paint will cure at least 2 weeks while it is being rewired and carpeted before launching it. Decided not to add hardener as product is very hazardous without expensive PPE.

 

[Jonboat2Bassboat]

Re: HVLP and paint additives

Re: HVLP and paint additives

Thought I'd add some photos of the boat. Will post more as work progresses.

 

[Bob_VT]

Re: HVLP and paint additives

Re: HVLP and paint additives

Looking good.

Yes add the hardener! The hardener will maintain the shine or the paint will oxidize FAST.​ The hardener helps the paint dry, have a harder surface and maintain the shine. Don't shortchange yourself if you have come this far!

 

[Woodonglass]

Re: HVLP and paint additives

Re: HVLP and paint additives

If you paint outside, On a non windy day, with a full face respirator like this one...

You will NOT destroy your lungs. Tape some Saran Wrap over the Mask to keep the Paint off. Mask cost me $95 bucks on sale. I painted my boat using the Hardener and Paint and I'm fine. So are my neighbors. Check the link in my signature below. You will NOT like the paiint without the hardener. It will scratch horribly.

 

[bonz_d]

Re: HVLP and paint additives

Re: HVLP and paint additives

Very interesting read here. Started to look at guns before I repainted my present trailer and decided the compressor I have isn't big enough and passed. Ended up using a sponge roller and it finished out very well.

 

[Woodonglass]

Re: HVLP and paint additives

Re: HVLP and paint additives

It's amazing how smooth and glossy of a finish can be obtained with patience and persistence with a foam roller and the Acrylic Enamel paint with the added Hardener. I've seen several PRO looking paint jobs here on the forum using the Roll n' Roll technique from guys that had never done it before.

 

[Yacht Dr.]

Re: HVLP and paint additives

Re: HVLP and paint additives

It's amazing how smooth and glossy of a finish can be obtained with patience and persistence with a foam roller and the Acrylic Enamel paint with the added Hardener. I've seen several PRO looking paint jobs here on the forum using the Roll n' Roll technique from guys that had never done it before.

Yea .. but have you seen the frustration of others expecting 'glass' like outcome from 'roll and roll' from other members ..

Do not expect the outcome of this product to match that what you see in the pics from ' first time newb roller outers ' ..

Can you get that close to the final finish of the pics .. ? .. sure . .. if you Know.

Go ahead and try it .. Wish you luck ( your gonna need it ).

YD.

PS. I hope your product is sandable and buffable ..

 

[sphelps]

Re: HVLP and paint additives

Re: HVLP and paint additives

Definitely use the hardener! Same glossy finish sprayed or rolled .If the temps are high use some high temp reducer. Orange peel can be a real pita !

 

[Jonboat2Bassboat]

Re: HVLP and paint additives

Re: HVLP and paint additives

Thanks but am concerned about isocyanates. Seems the only effective respirator is one with pressurized air in the $400 range. Have a half height 3M organic respirator just picked up a pair of sealed goggles. Even so, it is not for filtering out isocyanates, neither is the full face respirator so reluctant to take a chance. Most say not to spray without a positive air pressure PPE, except for one guy, but then most said I could not paint with the 20 gal compressor even though the gun's air requirements were matched to the compressor.

The jury is out on hardener until a little more research i done.

 

[Jonboat2Bassboat]

Re: HVLP and paint additives

Re: HVLP and paint additives

Primer came out a little rough. Think problem is material knob was out 5 turns feeding too much primer. Air supply is good. Will turn in material knob to 2.5 turns and practice painting before painting the boat. Will sand with 340 before painting.

 

[Jonboat2Bassboat]

Re: HVLP and paint additives

Re: HVLP and paint additives

What full face mask is pictured? Have seen several similar looking face masks on Amazon but hard to figure out what type of filter is needed.

 

[Woodonglass]

Re: HVLP and paint additives

Re: HVLP and paint additives

Check out this one. Call them and ask about the appropriate filter for what you are spraying. They have them. They also have the shield protectors.
http://www.qcsupply.com/moldex-9000...m_medium=cpc&gclid=CJiV-ofg3bECFUyjtgodwAQA4Q

Again, there is a risk. I painted my boat using it, as have others. I do not believe I suffered any ill effects. I supposed time will tell. My research led me to believe it would take constant exposure or significant inhalation of the isocyanates to cause any long lasting ill effects. I'm no expert so I could be way off base. It's up to you. Again, A good calm day, HVLP with minimal overspray, great resiprator and I'm thinking you are good to go. JMHO.

 

[Tail_Gunner]

Re: HVLP and paint additives

Re: HVLP and paint additives

Here's a solution from old Bondo...get a old oxygen tank (welding) and just plumb it to your compressor...works like a charm plenty of reserve.

As to that roll job yes it was a first time job..kinda..I spent a few yrs of my life finishing wood on high end homes....I cant tell you all the how i was mentored but nothing was ever good enough. After a while you tend to really watch your product and how it work's so if someting is going wrong you know where to point the finger...My wife was the key here i was rolling it out and she was tipping about half way around the boat i went back to see how she was doing...then asked what she was doing with a roller instead of the very expensive brush and she just blinked and said it works well....better than the brush. I looked at the nap finish it left and muttered sweet nothing's to myself and we finsihed the boat....

Later that evening i went out to asses the damage and was shocked to see how flat it leveled. It took me four more coat's to get there adding more and more flowing agent and closely watching how it tacked up had i not been exposed to finishing wood for years that would have never happened..It was by accident with the help of my truly blond wife..And a paint that i really think is incredible

 

[Woodonglass]

Re: HVLP and paint additives

Re: HVLP and paint additives

But...It was your 1st time, and Patience and Persistence, and experimentation is what did it. Just like ANYONE can do if they have the willingness to do so. I KNOW that not everyone has the skills to always be successful, but most of the people I've dealt with here on the forum that have the guts to try to restore a boat, usually have these kinds of skills. The pics they post and the text they post will soon enough tell the tale if they don't. There are no absolutes, but one things always for sure, You will never know unless your TRY!!!!! And you won't try without a little encouragement!

 

[ricohman]

Re: HVLP and paint additives

Re: HVLP and paint additives

Jonboat2, there is a lot of info about isocyanates out there and you won't find any good news searching it. I used to paint vehicles and all we used was a full face mask or the half mask. I have no health effects (yet anyway) but with all the research into iso's I will not paint vehicles without the PPE.
In Canada, hardener has been banned for sale to the public just like in the UK.
But hardener in your paint will enable the paint to be more resistant to UV and scratches.
If I was painting outside and there was a slight breeze (and if I wasn't reported to the authorities!) I may use the full mask pictured but I do know the risks. Even 3M does not list any of their masks to safely filter isocyanates although one can assume they must be safe as many people paint with them and companies selling them list iso's on the list of what they can filter. Its all about liability.
The VOC's given off are real concerns and I guess its up to you to decide what you want to do. I would never roll paint as I've been spraying for so long and trying to color sand can be very time consuming and pretty hard to do on any surface that is not flat.
But some people have good results with the roller.

 

[Jonboat2Bassboat]

Re: HVLP and paint additives

Re: HVLP and paint additives

Right now I am leaning towards painting outdoors with the following PPE: Moldex 9000 full face mask with the 7600 multi gas and 7940 P100 filters and a disposable painting coverall with hood. Moldex states their equipment is not intended to filter out iscocyanamates but I believe you are right, this is more of a concern for liability than actual health hazard, especially when painting outdoors. I applied two coats of primer over two days, 15 min each coat. I assume it will only take me 15 min to apply each coat of color, 3 coats over 3 days. Can't see how painting outdoors while being covered up head to toe with an air filtered full face mask is going to produce a significant health hazard.

 

[ricohman]

Re: HVLP and paint additives

Re: HVLP and paint additives

Right now I am leaning towards painting outdoors with the following PPE: Moldex 9000 full face mask with the 7600 multi gas and 7940 P100 filters and a disposable painting coverall with hood. Moldex states their equipment is not intended to filter out iscocyanamates but I believe you are right, this is more of a concern for liability than actual health hazard, especially when painting outdoors. I applied two coats of primer over two days, 15 min each coat. I assume it will only take me 15 min to apply each coat of color, 3 coats over 3 days. Can't see how painting outdoors while being covered up head to toe with an air filtered full face mask is going to produce a significant health hazard.

With hardener, shoot your tops coats in the same session. Once its flashed get the next coat on. First coat is just a tack coat, keep it thin. Once the tacky paint feels like masking tape adhesive through your nitrile gloves get the next coat on. I always shoot a test pattern before each coat on a separate piece of PPG paper. And you can go back to your test to see how tacky the paint has become.

 

[Jonboat2Bassboat]

Re: HVLP and paint additives

Re: HVLP and paint additives

Thanks. Am using X-O Rust for top coat, True Values brand of Rustoleum, an oil based paint. X-O said to wait 24 hours before painting second coat. This may be a bit of a stretch for an analogy, but the primer was Rustoleum Marine for metal. They said to use no more than 5% mineral spirits to thin but had to use 25% to get it to spray. In the same vein, X-O also said to use no more than 10% Xylol to thin. Think will have to thin with 25% Xylol to get it to spray. Given the discrepancy's between the manufacturers thinning advice and actual thinning required to spray, I think your advice on spraying second coat when first coat is tacky is well taken.

Am painting outdoors. Paint dries fast and with a hardener will dry faster. What should I do if the paint on one side of the boat dries before I can add a second coat?