first of all.....if u using the non-PS paint for your lexan body...........which is using for common plastic model ......it MUST be tear off one day......
besides tamiya PS paint....some other brands will also have paint for lexan body...but sorry i can't remember the brand name right now.....u may better check it in the RC shop.....
then tamiya PS spray paint absolutely have metallic purple....
also u dun have to use paint in the same brand for multi-color paint job.......because the paint won't "mix" togather if u paint and state completely dry b4 u paint the other color.....it will be fine.....
hope those can help u.......