I am about to put together my Fridge smoker. Its probably late 1940-50's fridge. The inside is all metal and im covering all the holes where plastic was with sheet metal/angle iron. My question is regarding the paint on the inside metal liner. I tried to strip it but paint stripper didnt do anything. Do i need to worry about it being lead based? Do i need to sand it down? Its like supper paint... What did you guys do?