Search is turning up mixed results for this. I have an ash body (shh..strat shaped) which i sealed with a few wipings of shellac that I mixed from dewaxed flakes. Not sure when I'll get to it and I didn't want to let it sit around without being sealed. I was also thinking of a FP finish. But now I discovered an eBay seller who ships TO to Israel, so I have a bottle in the way to me! Seems like some people say no problem applying a TO finish over dewaxed shellac, and other people say to that TO should go over bare wood.