this is really a simple project
.. If the thickness of the foam was indicated, I missed it but the thicker, the stronger and the laminate can vary with that thickness. I'll assume about 1/2 inch? maybe more? I would use 600 or 800 DB gram clothe to make sure, or whatever is available cheap
(know someone finishing up a big project
with excess?) and any resin that is cheap
, poly is fine! And it isn't toxic like epoxy
, not that this small project will be a big risk but if you do use it keep the stuff off your skin and avoid fumes.
Wet the foam, lay on the clothe, consolidate well, work all the air out and trim excess on the edges with stanley knife when green. "Q" cells for filler on a finish coat, sand to taste and coat. I would just use epoxy
primer and polyurethane
top coat but there are other options of course. Whatever matches the adjoining surfaces best/easiest/cheapest.
For a nicer finish on the layup
, I like to use peel ply. More even surface and already keyed in for subsequent work.
I know some brilliant boats of foam and poly, most ply boats I know use vinylester but epoxy is my choice for underwater. It is less permeable than any other so osmosis
is avoided. But I hate epoxy's toxicity.
Polyester works fast so you must also... epoxy sets slower so you must wait...
except for special purpose variants, poly and vinyl shouldn't be expected to stick to epoxy but epoxy will stick to them.
Do in the shade, moderate temp and low humidity.
fun little project... but I call it a turtle top.