I used paint stripper on the top. I had three layers of paint to remove. The under side I used both stripper and a wire wheel. Yours may be a little easier since some one used what looks like Por15 on the under side of my trunk lid. That was the main reason I used the stripper. If you do use paint stripper, make sure you use it in areas that don't have nooks and crannies. If you don't do a good job removing the residue, your new paint will not adhere well.