Copper bottom paint. A freely accessible platform to generate and disseminate vital resources for those working to preserve cultural heritage worldwide. Our paint finder shops over 50 different bottom paints across three industry-leading manufacturers: Pigment RedCadmium Red. They are designated with C. We flattened the back side to make the bottom a bit wider and made a new higher back side. Solid copper is the most valuable while non-solid copper is not very valuable. Any thoughts or advice would be appreciated. Auto paints work just fine for household projects. Find out if they will pick up. GastroMax Slotted Turner Spatula. Genuine; trustworthy.