Do I have to Sand?
No. And Maybe.
The short answer is that BB Frösch Paint Transformer helps any paint to bond with virtually any surface. However, if that surface has peeling or chipping paint, your paint can only bond to what is already chipping or peeling off—it can’t bond to the surface underneath. In this case, you must sand any areas that are peeling and chipping. We recommend a coarse-grit sandpaper.
If you are painting a previously painted or waxed surface, or a surface that has a particularly high sheen, it is also helpful to sand. In this case, you really just need to scuff the surface with a coarse-grit sandpaper to give it “teeth”/something for your paint to grab to. You DON’T have to completely remove the existing finish.