I second spud's advice. The AK product line is amazing with weathering easily. I used it on my T-90 back in last year's BSC and it came out wonderfully. well, until I overdid it on the mud and spatter effect. The glorious part of it is that if you're sure to put down a solid coat of Future to the entire thing and dont like the effects, you can can just wipe them right off with a little bit of White Spirits or Odorless Turpenoids!
If you do get some kit from AK, make sure to invest on some fine brushes, an aluminum pallet and the 100ml Bottle of White Spirit.
*P.S.---- Loving that color scheme on this one. It pops quite nicely as it is, a dark grey/black pin wash should make those panels and details jump out nicely!*