That would depend on the final results you want in that the local environment of the tank, tracked vehicle, or tracks stored in a barn or discarded on the beach. The basic primary approach that works for me is to clip and hang the female connection end so you can be hands free. I am also currently painting my vinyl tracks in 1:35 for a T34-85 which were generously donated to me by a very fine fellow Hobby Head straight up keepin' it real, lots o' love, Bro.
I start with Rustoleum, Ruddy Red Primer, spray canned directly onto both sides. This gives it a brown red base. After about 8 hours, follow with a wash of black or dark grey. Then drybrush according to your model's local environmental needs.
note: 'Celuclay' works pretty weel for mud if needed.
Hope this helps.
just got home from work and cracked a beer...