Back "In the day", some of the engineers at Chrysler took their new cars,
temporarily plugged the rocker drain holes, poured a quart or so of Rustoleum
primer into them and drove around for awhile that way. Then they drained
and dried them. I have no idea whether it helped, but always figured it
couldn't hurt, unless it dribbled out onto the rear wheels, etc.
Joe
Savard
Lake Orion, Michigan