Painting aluminium boat..where did it go wrong

[eric hall]

i have a 2001 crestliner 2166 sst when bought it needed painting and sprayed it with 2 pack.It turned out well but after 3 years it has started to bubble again. Where did it all go wrong.

 

[rockyrude]

Re: Painting aluminium boat..where did it go wrong

I guess the question would be, how far did you go to the aluminum? Did you have bare aluminum? How did you prep and prime it?

 

[eric hall]

Re: Painting aluminium boat..where did it go wrong

It was taken back to bare metal then etch primed then filler primer then loads of 2 pack.

 

[eric hall]

Re: Painting aluminium boat..where did it go wrong

Thanks for the replies.Ive been trying to find my thread for about 3 -4 days ,found it by going to "my profile".... once again thanks.

 

[heyyou325]

Re: Painting aluminium boat..where did it go wrong

Painting aluminum can be tricky. Any bare aluminum needs a special primer on it. You need it real clean. Any paint that can be left on, only needs regular primer. If it bubbled, it seems to me either it got wet, bare metal wasn't properly primed, or it wasn't clean. My first paint job on my Crestliner lasted for about 10 years,over old paint, but primed. Then I added a top and some other pieces, and the paint didn't harden properly, When you washed it, after 2 years, the rags would come out paint colored. So I repainted it without primer, and it started chipping down to my first paint job. It got wet, and wasn't warm enough when I painted. But after 14 years, that first paint job I did properly is still stuck real well. The prep makes the difference.

 

[Thalasso]

Re: Painting aluminium boat..where did it go wrong

Aluminum needs to be primed with Zinc Chromate not Zinc oxide which is a metal primer.

 

[jigngrub]

Re: Painting aluminium boat..where did it go wrong

It's really quite obvious, you painted aluminium instead of aluminum!!!

Two completely different elements... with aluminium requiring the paint that UFO's are made of!!!... did you state UFO paint at your local paint shop????????

 

[Huron Angler]

Re: Painting aluminium boat..where did it go wrong

It's really quite obvious, you painted aluminium instead of aluminum!!!

Two completely different elements... with aluminium requiring the paint that UFO's are made of!!!... did you state UFO paint at your local paint shop????????

LOL...Actually in Europe that's the proper nomenclature, here in the State's we call "aluminium", "aluminum" and the same painting principles apply to both since they are the same metal.

What kind of paint did you use? Painting aluminum is tricky, prep is as important as using the right product.

Zinc chromate primer will work, some claim that alodine on bare aluminum is the best way to get good adhesion.

Here is a link to a site that deals with painting aircraft, they know how to paint aluminum if anyone does.

 

[Thalasso]

Re: Painting aluminium boat..where did it go wrong

I think painting aircraft is allot different then watercraft being's it isn't subject to galvanic corrosion created by other aircraft.

 

[eric hall]

Re: Painting aluminium boat..where did it go wrong

well thanks all of you for your input... I say tomato you say........ We also call it ALI for short, but then it could get confusing with someones name,an d something Like I painted ALI could be misinterpreted