- Vinyl decals - try applying hot water for 5 minutes. Hot to touch, not boiling and decal must be continously covered with water. It should slide off.
- Stickers - if goof off doesn't work, try epoxy paint solvent. It's added to epoxy paints that you use on floor, but you can buy it separately. This stuff is several times more potent than anything I've tried. Found out by accident when pouring into sink with a sticker at bottom. The sticker just slid off seconds after applying.
- If those two don't work - it's probably some heat-set paint, you will not remove it chemically.
- Stickers - if goof off doesn't work, try epoxy paint solvent. It's added to epoxy paints that you use on floor, but you can buy it separately. This stuff is several times more potent than anything I've tried. Found out by accident when pouring into sink with a sticker at bottom. The sticker just slid off seconds after applying.
- If those two don't work - it's probably some heat-set paint, you will not remove it chemically.