I removed the carpet from my 1920's staircase to find layers upon layers of oil based paint. I started with a chemical stripper and have moved on to a heat gun. The wood is damaged slightly in some spots but can be filled. The wood seems quite dry and brittle. I'm wondering if I should continue removing all the old paint from the treads or if I should just prep to paint over it rather than stain? I'm not sure if stain is a viable option at this point. I'm in a little over my head unfortunately.