Grind an inch and one half red devil handled paint scraper into a convex shape that will generally conform to the hull's curvature. keep it sharp. Serious scraping of a well laid up bead and cove hull will produce an interior surface approaching the exterior after sanding with 80 grit on a cylindical pad.

> I use 36 and 50 grit sand paper on the inside to get rid of most
> of the steps and then use some epoxy/woodflour/micro-spheres putty
> to fill any low points. I try for a good cosmetic finish were visable,
> but elsewhere I just want an even surface for the glass. The surface
> left by course sandpaper is not bad because it promotes a good bond
> with the epoxy.