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Slow and Safe
Safest Stripper, made by 3M, can be used indoors without special ventilation or gloves (although if your skin is sensitive, you may want to wear them anyway). Safest Stripper is particularly effective on oil-based paint and polyurethane. However, it can take as long as 24 hours to soften a finish. Safest Stripper seems to pull oil-based finish out of the pores better than other strippers, so it’s handy for woods like oak and ash. Because it's water-based, it will raise the wood grain and can loosen veneer.