Has anyone found a good compound for filling in nicks or scratches in a Mac case? I want to go a bit further than that and fill in some areas of a case (as in some lines on IIcx cases). Has anyone tried this? I think it can be done, but I'm not sure if I'm going to be able to make the filled area invisible unless I sand it and the entire case smooth - which I don't want to do. Case will be painted, so that should cover it, I just don't want a totally smooth case but that may be the only way.