that's a bit odd. Here's why: Every time you use a product, you remove X amount of clear coat. Let's say one application of 105 removes .01u of clear. It will remove that much clear *every time*, regardless of whether another compound was used previously. Let's say that PG also removes .01u per application. That would mean that on the side you did with PG and 105, you have removed a total of .02u, which would mean that the defects on that side of the hood are pretty deep. Eventually, with repeated applications of *any* abrasive polish, you'll get to either the bottom of the defects, or the bottom of the clear coat, whichever occurs first.