I have a question about the grain filling process on my Mahogany table top. On my test pieces, after staining and sealing with shellac I applied an oil base grain filler. I wiped it on across the grain, waited about 4 minutes and then used a squeegie going across the grain to get the bulk off, then, to get the resedue off I used burlap and boy, I had to apply a lot of pressure and still could not get it all off. The next day, I lightly sanded the piece with 600 to get the rest off. I was very afraid of sanding through the shellac below and then into the stain which would be a bad thing on my finished table top. Is there an easier way to get the excess filler off of the wood surface and keep it in the pours. Should I not let it set up at all before wiping it off? Should I have 2 coats of shellac below the grain filler? Any help would be greatly appriciated, Thanks