Its a solid base-coat but I think the metallics could do with a bit more depth. Also not to nit-pick too much, but are the
HBs the right way up on the second from bottom?
Another detail oriented comment I ahve is that all the tanks seem to be 114. The standard Guard designation is a 3 digit number corresponding to company/squadron/tank, hence the numbers on each tank should be different (it also helps you build up their mystique when they start doing awesome stuff on the battlefiled

)