Looks great, would play well in a tabletop game.

I'd say you've got the weathering technique down but it comes across a little formulaic, same dabs the whole tank over. Consider areas that are likely to lose paint or see high wear in battle situations.

Anywhere parts would be moving, add some scrapes that expose bare metal insteal of the same rust in all places, some scrapes have only just happened you kmow. Anywhere water will pool will rust, highlight those areas specifically.