Lilab,
I painted a 788 Rem with the Walmart paint and it stuck to the metal as good as it did the Ramline stock but it doesn't have a highly polished metal. Its been on about five years and has worn some on the bolt handle, grip and forearm but still on the barrel. I did not paint it solid and used the black and blue as a background. I think I cleaned the gun with alcohol pads prior to painting. I only used the tan color on mine.
James