The aluminum body side panels were scratched and I wasn't able to polish them up to a level I was happy with. So I went back to an option I had originally considered for this build, carbon fiber. A base coat of semi gloss black was sprayed on to promote decal adhesion.

Scale Motor Sport 1/12 scale Hi Def C/F decal (#1512) was applied in two main parts on each panel.
Once FULLY dry, a 50/50 mix of Testors Dullcote and Glosscote was sprayed in a medium light coat and allowed to dry. The same application was repeated about 30 minutes later. The seams of where the decals overlapped were sanded out with 1000 grit wet and another coat of the 50/50 mix was applied to make the sheen uniform.