I've had a lot of problems with battery acid being blown up on the back end of my 97 M3 after being at the track. Have already painted the rear end once and a year later I need to do it again. It was particularly bad this time after 2 days at Willow Springs this month. Can't be driving faster than the rest of you out there. Any ideas, other than replacing with a different battery or rerouting the drain tube? Help!!!!