My sister has this white oak table bench that is just plain varnished from the factory. She wants to stain it black so I have to strip the finish first. What would you recommend ? I was thinking about using my dewalt 13" planer or my jack plane but I don't know if it will ruin my blades or not. Sanding is another option but sucks...then there's the chemical stripper option. Bench is about 12" wide and 6-7' long