What NOT to get on PPF?

Hey all...

I'm planning on washing / claying / DG #601/#105 combo my friends Audi that has PPF on the front end.

Do i avoid getting CG Bug and Tar remover on the PPF?
I know not to get clay on the ppf.
Is the ONR i use as clay lube ok to get on it?
I"m guessing i don't seal it with the planned DG #601/#105 combo.
Do i apply anything on the PPF at all? or just leave it?


If we have some time i wanted to hit up his engine bay. should i avoid letting any of the APC / TAW get on the film?
Cover the quarter panels with towels?

thanks for the input! :worship2: