Does anyone know what are the guidelines about whether you can have light chemical peels (eg 8% Glycolic acid) prior to and post IPL?

I have a friend who has a few minor skin indents on her face and has been applying low concentration Glycolic acid (8%) to only these areas and nowhere else on her face every two weeks or so.

So can she still have IPL on her face including over the areas where she has applied the G.A. or does she need to stop the GA for a month prior to and post IPL then restart later on?

Many Thanks