My husband and I are remodeling my father's house he grew up in. I am now starting on all the wood. I am wanting to stain it. First, I have to scrape off all the old paint. The top layer of this paint has been on for about 20 years and who knows how long the other two layers have been on. I have tried sanding, using paint thinner, and using a scraper. The scraper is doing ok but, I would like to speed it up a little. Can anyone help me out a little.