I have some CNC cut blanks to sand and glass. The bottom is completely smooth, the rails have real fine lines, only the deck is coarser.
These might be bad ideas for finishing and glassing the boards - I'm just curious if anyone has tried either of them.
Method 1. Pretreat with cabosil (or some kind of putty), let it dry, sand, and glass.
Method 2. Simply paint on some cabosil, then glass right away over the cabosil.
I'm trying to make the shape smoother, and reduce the amount of rough sanding. The adhesion should still be good on the bottom, since the bottom is already perfectly smooth, and the bottom is what needs to be strongest. Next comes the rails. Mine have fairly fine lines from the CNC machine.
Anyway, I might try this with one of my blanks. I would guess the board will be at least surfable. Repairs ARE done this way sometimes.