Today I discovered a variant from the Dark Age set. I'm sure there are others so lets post them here so that collectors like myself can track them down!!!

DA-72 Behemoth Tank-Steel Wolves- The more common unit is mostly silver, but the variant is mostly brown.

SW also had the Condor from the same set

I seem to remember a few SW paint variants from early on. I think the Blackhawk was one of them.