Join Date: Dec 2005
Location: The Swamp...Lousy-anna
2006 Blue over Primer'd Bondo 6spd #23424 slapped together 2/22/06
Regarding a silver paint problem, the silver paint itself isn't a problem. I don't think the problems I had with my truck's paint are the same as the original poster's, as I don't have any "whitish" spots.
However, I DO have some spots on my driver's fender top and the tailgate that are very susceptible to the angle of light, and appear as different colored "spots." What these areas are, however, are areas where underneath the silver basecoat, sanding was done. Either to remove trash, debris, spots, etc...certain spots were sanded before the basecoat, and simply not sanded well-and not with the proper grade of sandpaper.
This is exhibited as scratches UNDER the silver basecoat. You can't feel them, or see them when you look at the overall smoothness of the clear...but you can see them in the way the light REFLECTS. The metallic silver basecoat is "sitting" in the ragged edges of the harsh sanding lines just underneath it, which shines slightly different in different light angles. Any area sanded this way exhibits this "look." Since most "spot sanding" is usually in little literal "spots," they appear more or less round. There is enough basecoat silver and clearcoat on the truck that you don't actually "see" the scratches (besides the illusion of spots caused by the above) as they have been leveled off by the painting and/or polishing process creating an overall "smooth" top layer. The thicker the clearcoat the less you "feel" the sanding imperfections.
I have several spots on my tailgate, but it is very difficult to see due to the angle of the gate. I'm not worried about them. The driver's fender, on the other hand, is hideous. As the paint has shrunk over time it got worse, and the spots are simple to see. But, once you see them, it's clear (no pun intended) what they are caused by...poor spot sanding with too harsh of a grit sandpaper just before applying the color basecoat. I'll have it fixed if I ever find someone who can do competent work down here in Louisiana.
Other colors exhibit this too...but are more difficult to spot. The silver merely showcases it more than other colors. Yellow is so bright that it hides it, and the darker colors naturally mask it.
Bear in mind that this is NOT exhibited as a "milkiness." If you DO have a milky section, what that is is the clearcoat separating from the basecoat. It must be repaired. Over time, as it dries and separates more, you will be able to literally pull it off with your fingernails. Any moisture or air between paint layers WILL cause that paint to eventually fail.
The two tone trucks have a LOT of clear as they have been clearcoated TWICE (the trucks were originally painted one solid color and cleared, then the second color was added (after surface prep on the clear) and the entire truck was cleared AGAIN-this was from the paint manager at Lansing). If the prep was not done properly on each clearcoat process the paint can separate on either of the two clear layers...even the layer that has been painted over solid with the two tone's 2nd color.
Hope this helps!