Took me a minute to figure out
what the heck you're asking about: getting rid of the "ghost" of a previous name that's left after it's removed because the gelcoat under it hasn't oxidized, but the rest of the gelcoat has. No formula, just straight bleach, sprayed on as often as possible. Works better is the transom--or wherever the name was--faces the afternoon sun. In most cases, if the new name is painted on, you can go ahead with it and continue "treatment" till the ghost disappears. However, the bleach can fade the colors in some decal names. So if you're gonna use this method, tell the new name supplier/painter...and ask whether the pigments in the paint or decal can be harmed by it.