Just been redoing the windows on my Universe Ironhide, and I noticed that some paint was chipping off on some vertices, leaving behind black. Thankfully, he's damaged anyways, so this is good for him. However, on some of my other customs this is happening as well, which is slightly less welcome. This seems to happen to customs painted with silver, then a clear colour on top of that, regardless of whether the part itself was black to begin with. In Ironhide's case, there was no black whatsoever near the parts in question. So now i'm wondering, 1) Anyone else had this happen?, 2) How can i deliberately make it happen when i want it to (coz sometimes it's useful)?, and 3) How do i stop it? I should probably mention i'm using Mr. Hobby's Metallic silver and transclucent paints, both acrylic.