I would like to refinish my old (50 yr) classical guitar and would like to know how is best to remove (strip) tho old lacquer finish. Do you any suggestions on how to proceed (is there a book or video that can guide me)? I've heard that chemical removers are bad, so should I use a scrapper and sand paper? I would like to do a French finish after getting rid of the old cracked finish. Many thanks for your help.