Maybe I’m confused, after reading so much info from this site. Building my first eps/epoxy board. Hotcoated the deck last night using RR resin and add “F”. I continued to mix the resin in the cup for about ten minutes to warm it up a bit. Probably too long. I used the normal hotcoat technique I would have used for poly including cross strokes and final walk-out. It never really looked like the smooth coat I would have expected. Any help, tips would be appreciated. -mv
Howzit vern, I would’n’t worry about it to much, you’ll take care of the lumps when you sand it. A few years back one Of our boys on the qualifing tour brought me a board from down under that was only hot coated and needed to be plugged and sanded. The guys who glassed it were in a big hurry and it was a mess with lumps bumps and sharp glass edges , but it was fine after it was done.Aloha,Kokua
I just finished my first epoxy board. I got the same lumps and all i did was a take a palm sander w/ 80 grit and had at it for about an hour. its smooth now with no exposed glass. (i used alot of resin for hte hotcaot on intentions of sanding alot)
Getting perfect hot coats can take some practice. Fortunately perfect hot coats, while being easier to finish, are not that critical in the finished product. Just a bit of extra sanding is all.
Howzit G.(dang)L.?!? I’ve been pretty stoked on the way my R.R. boards have been coming out. The trick to sanded finish seems to be to not get the mean scratches to begin with. The laminated glass sands so easy, that I can eliminate all the pesky high spots, and then do a nice slick hot coat. After that, light grit paper smooths the finish out without adding more scratches. The last ones I did finished as good as p.e., down to 400 grit. Aloha…RH
Thanks for everyones advice and encouragement. I hotcoated the bottom last night and it came out completely different. Nice and smooth. This time I did’nt warm the resin in the cup, just spread in on and walked it out. Greg, I think you’ve got another convert. Looking forward to meeting you in August at Cerritos. -mv
I continued to mix the resin in the cup for about ten minutes to warm it up a bit. Probably too long.
when you heat epoxy resin the idea is to warm it up before adding hardener ,this makes it a bit runnier.you can heat it up with a hair dryer or i heard a microwave oven…
how do you heat it up by mixing it in a cup for ten minutes? …all that does is shorten your working time. the reason its getting hot is because it is curing … that is why you are getting lumps… Its quite simple really…
here some simple tips.
use big shallow containers (this extends pot life)
if you?@want to heat. do it before adding the hardener.
measure and mix thouroughly (should take about 1or 2 minutes)
I do my filler coats(hotcoat) while the cloth lam is still curing.ie after about 6 hours.This ensures a good chemical bond between coats.
recheck the archives .
cheers Paul