UP and UC or M105 and M205?

UP was my "gateway" polish to the addiction we all have.

I find it really easy to use and it works great on soft Subaru or Toyota paint. My only complaint is the amount of oils in the product. While they are great for giving the product a long working time, I found they become an issue when trying to prep for a coating. They seem to survive the typical buffing, and I had to be really careful with the prep spray to make sure they were all gone. Some spots took an extra pass as I could still see a bit of oily sheen in my work lights. This isn't an issue if you're using a less "picky" LSP like 845 as I've never had any durability or appearance issues.
 
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