Dangerous camouflage of acne?

I have a question: can a black eyeliner damage grafts when applied on a red pimple following a transplant? I would think not, since women put it right underneath their eyes, so it can't be toxic. I've been told that they can quickly dry off pimples.

Another question: how about a regular anti-acne cream? It seems that that could potentially be more dangerous for the grafts?

I'm particularly interested to hear on this one from doctors.

Thanks.