might need to be more gentle with the EasyCast than with a polyester resin.
Epoxy tends to be a bit softer.
Don mentioned wiping sawdust between grits, and that's something that's
easy to miss, but very important. Grit comes off of the sandpaper as you
use it, so you move up to a higher grit, but still have the relatively large
sand grains from the last step (or several previous steps) left on the work.
Imaging going up to 12,000 micromesh and having a stray piece of sand
from your 200 grit sandpaper show up on your blank.. and then you grind
it in with your micromesh pad..
ps .. 350 grit is a bit unusual around here. Any chance that was some type
of 'off-brand' from a discount place? If so, don't use it on anything but
rust removal or things you don't really care about.. never for finishing.
Clean your grill with it, but not your blanks. Quality control for those papers
tends to be hit-or-miss, and grit size isn't consistent enough to trust it for
any finishing work. You'll end up re-doing the work with good paper or you'll
end up throwing away the piece.
Life is too short to use cheap sandpaper. :tongue: