Very nice build on that early dragster. I recently finished the Monogram Slingshot Dragster as the Cook & Bedwell Dragster which it really is, however Monogram didn't want to pay royalties. They did the same with the Green Hornet kit which is really the Grasshopper car that was on the cover of Hot Rod Magazine in the late 50's.
On colored plastic bodies I use Tamiya Silver Leaf, followed by primer, then my color coats, and finally my clear coats and have never had a problem of "bleed through."