From past experience: If your using an airbrush on your HL Abrams take a look at Tamiya XF 59 Desert Yellow plus XR 59 Buff for pre shading. If your using Tamiya spray cans, these colors will work: TS 68, AS 15 and TS 90 for pre shading works. Primer your metal parts first, whatever you use. These are a couple of my HL Abrams.