>>9819253>>9819277Here's another example. Before priming, this was three different shades of resin grey and putty white - never would have seen this. If I brush painted this, it would take me several layers before I realize what's happening.
>any other paint can do it tooYeah, and try putting putty on top of non-resin paint, tell me what happens if you ever try to sand it.
Again, I must stress that primer (the useful kind) is not regular paint. You cannot sand vallejo air. You cannot fill holes with tamiya xf-1.