HE shells to the tracks. Very little damage, very small fine, and resets their cap counter.
I've recently started making proper use of my Matilda and M4A2E4. I get my doubles in the T-44 and Patton, then immediately move the crews to the premium tanks. Makes for a far more productive evening. Seriously considering the purchase of a Churchill now.
'06 Suzuki Boulevard C50
'92 Suzuki GS500E (sold)