You might do a search re ZEP. Seems like some time back there was a thread on it and IIRC, many felt that it was not a good idea. We've never used it, so have no help on that. Are you going to replace any decals or stay white only? If you're going to replace, suggest you not wax until they're applied because you're going to have to clean it off the area before applying. Many use 303 Protectant on the decals and have been very pleased. Any chance just some detailing would make them presentable? Currently we're using a wax that is specifically for using a buffer, but do not get near the edges of the decal or you'll for sure have to replace....think it's either a Mother's or a Maguire's product. Does a really good job and the buffer makes is fast.