I've mixed PolyCrylic and talc with a bit of distilled water for a good cheap filler that didn't stink up the house. Sands real nice with 400grit. I've applied before and after covering with glass. Fills in the weave nicely.

As a kid, I and my flying buddy , made our own filler with Aerogloss clear and his baby brothers bath talc. Slight blue tint and smelled nice after the buytrate vapored off.

Ray W.