What BW said ++++
1) Wash the old surface with TSP ( trisodium phosphate ) to remove old grease, dirt and /or dull an enamel finish.
OR
2) Put a coat of Bullseye 1-2-3 over the old surface then apply the top coat. Stuff isn't cheap but works great to cover and seal smoke
damaged or grungy surfaces.
Hope this helps
Bookmarks