Need advice with my process before paint. I have removed the paint on my 1984 Starcraft MR 180 and see alot of corrosion in the seam areas. So my question is what would be the sequence of these products as I have purchased all of them. 3M 5200,Goop It,Parker primer and Parker duck boat paint. My thoughts are prime,5200 the seams then goop apoxy then paint?