I would like to paint my metal front entrance door. I used nail polish remover to see if the paint comes off and it doesn't; therefore I have been told it is oil. I have been told to lightly sand it, wipe it down, let it dry and then I can use Bulls Eye 123 primer and the color I want in an Exterior Gloss Latex. Is this true or will it peel? Can I use a roller for the primer and a sponge roller for the Latex?