Before the summer gets too far along, I have to varnish the cockpit of our MC16.5. I applied 6 oz. 'glass under 2 coats of epoxy to the entire area so the weave is not entirely filled and there is a nice texture that I want to maintain for a bit of traction. How should I go about prepping the area? I thought I would just sand it and then varnish...but with the texture, sanding won't be entirely complete with the slight dimples in the 'glass...will the varnish adhere adequately?