I have 10 white oak dining chairs that I am getting ready to finish. The matching table is finished with minwax polyurethane. I was thinking of just using the same for the chairs but I am going to re-level the table and refinish it since it warped since the wood was too moist when I built it so I can use whatever for the chairs and just use the same when I redo the table. I am in the process of scraping the chairs smooth with a card scraper. Do I need to sand them after they are scraped? I remember that I had to sand the table after it was scraped smooth. When I finished the table I did not sand it and the second coat of poly started to pull the first coat off the wood so I had to strip it and start from scratch, I sanded and everything was fine. I know I have read several places about people just planing and scraping then finishing and no sanding. Is the polyurethane just not good for doing that, or should I have thinned it before applying it if its not sanded? If possible, I would like to spray the finish since I have 10 of them to finish and theres a lot corners and whatnot, and I would prefer not to have to sand all of them after I scraped them. I scraped them instead of sanding them because there was some blackening that happened when they were glued together and scraping is much faster than sanding... and its quieter. Any ideas for what finish to use and how to prep it?