Do you have one of the kits molded in white? If so, you might just mask it off, spray your blue, chrome foil the trim and let the white shine. Otherwise, same procedure but paint the white first, dry thoroughly, mask off and spray blue. Mask generously, that is, maybe let your tape ride up on the chrome a bit to get complete coverage. You will have a small tape edge on the chrome to knock down before foiling, but you won't be fighting precise masking the inside corner, so to speak, where the white meets the chrome. My 2-cents...