take the two you hate the black and the silver thats on it, fine sand the silver lightly and take a big old lump of saran wrap and crumple it into a raggedy bunch. dab in the black and splotch it so it looks like marble. use a feather and make some veins where they look to belong in the random splotches dry finish sand and clear coat.
gold decals on top
or if you want it to go faster air brush flames all over it.
this is my favorite custom paint trick take a black or dark color paint mix two batches one normal, one super heavy metal flake or diacromatic elements. paint the first normal layer dry finish sand then mask out zebra stripe patterns, leopard or tiger markings teeth ect or lightning bolts, stars whatever you can make stencils of. it will not really be apparent in normal lighting if you do it right and when in full sunlight will be noticable and really neat under streetlights at night.
or military camo would be cool.