Anyone done this? I have a pair of Phoenix/Lemforders here for my W123 that I haven't installed yet. I know that any dino fluid that gets on them can accelerate their aging. Aside from regularly degreasing them has anyone ever tried coating them with something as a passive protection? While filling the hollow cavity with urethane helps I want to address the deterioration of the black rubber. Of course the ideal is a bone dry engine bay and the ability to stop a leak before it happens and maintenance procedures that don't lose a drop of diesel, oil, atf but I'm just not there.