If you don't mind........., a hardcore F1 builder may be able to help with the color. Try TS21 Tamiya Gold as the base coat. Then Follow up with TS74 Tamiya Clear Red. The silver base coat, does not really give the color change that the gold does.
Look here:
http://www.f1m.com/classic/PNphpBB2-...ght-f2007.html
Just my $0.02