Re: 1968 Glassmaster Runabout
I have not done anymore with the glassing as I want to make sure I do not screw it up again. Also I wanted to make sure I get the proper setup for cold weather glassing as the temps have been in the 30's-40's. From the outside of the can, the resin I am using has a 90 shelf life.
I did get a nice heavy tarp to tent the boat with an a halogen light which I believe will be needed.
Would a 1500 watt electric heater work ok for heating up the inside and substrate?
Thanks for the info oops.
Would using too much resin with the 10.5 csm layer and letting it fully cure and doing the 1708 a week later cause this too?
kinda yes,,,,and kinda no...lol
Also, what is a resin roller? Is that a thin-fin roller?
woodies got a pic
After much thought and going back over that I did, there was a bunch of errors I did when I did that last layup.
Thank you
Ok....when laying 1708 and csm.....do it all at once....
the reason is that you want the short strand hairs of the csm to blend with the csm on the 1708......this will give you a really strong laminate.
when you lay the csm ....then let fully cure.....you need to grind off the top layer of resin and get to the glass....resin will usually come to the surface a bit. if you use too much resin....there will be a resin rich weak layer between the two.
so .....when you glass.....grind the substraight ....you want to clean the surface...and get rid of the resin rich layer....
then vacuum the dust......then clean with acetone....
now you are food to go on the csm......wet out the area with resin.....not just wipe once with a fuzzy roller.....but slide the roller sideways....
If you just "paint" the area with resin... when you get real close....look at the sub straight....there will be tiny areas where the resin is not touching the substraight....kinda like small pockets of air........well....this will cause micro bubbles in the layup.
a bondo spreader is a good way to avoid this in the wet out stage. you can use quite a bit of resin in this stage.
now lay the csm over the wet out area....take your fuzzy roller and flatten out the glass....let it soak up the resin just keep rolling.
add more resin if needed....
then take your resin roller.....and chase out the air.....very little pressure is needed. if you press too hard....you will squish the resin out of the glass......it will leave white roller marks.
once you have that rolled free of air....
lay the 1708 down.....make sure you do not disturb the csm.
as before....take the fuzzy roller and flatten it out.....keep rolling till you see if any resin is soaking into the glass.....
if not.....add more resin....
Here is where a bondo spreader is a good trick.....just move the resin around to the dry spots with the spreader...
you will see the glass soaking the resin....now take your resin roller and start form the center out....
If you are doing a corner.....start at the corner and go out....if you need more resin....add it....dont worry about too much resin.
just keep the resin roller moving...
if you are doing multiple layers of a csm/1708 sandwich.....add the next layer of csm now and repeat as many as 3 layers each of 1708/csm for a total of 6 layers.
after the last layer is done.....take the bondo spreader and swipe any excess resin off the material.
then just take a cloth.....and remove the excess resin around the edges....if you dont get all the standing resin.....just let cure. and grind it away.
if you are in a situation that more than the 6 layer total is needed....wait till the resin is almost cured....and most of the heat has gone out of the initial cure....this takes about 40 mins.
then start adding the next layers of glass starting as always, with the csm.
as for the heat and lamp....yeppers......thems the ones...
just make sure you can breath under the tarp......those fumes will knock you out cold.....and you will wake up with your face stuck to the boat !
