I was going to prep my golf w/ it today before using UPP, but after applying and wiping off I could help notice a residue still on the hood. I tried buffing it off but it seemed like an oil was left on the paint, I figured that would cause a problem for the UPP to bond so I gave the hood a rewash using dish detergent. DD stripped the oil that was left behind, but is it suppose to be like that? I shook the bottle very thoroughly, so I don't think it was a problem caused by seperation. I've had nothing but great results w/ PB products, so I'm just wondering if I did something wrong?