I have begun removing the thick clear poly coat on my 'natural' finish ash J bass. It's popping off easily with the heat gun and leaving what looks like bare ash underneath with a deep grain. My question is, is there anything else underneath the clear coat I need to strip before the wood will accept stain, or is that bare wood? It absorbs water, so I don't think there is a sealer, is there? Also, I love the deep grain, but do I have to fill that in before I stain? I like the old Gibson Voodoo guitars with the deep grain you could feel, can you stain it like that?