Some advice please I want my girlfriend to WAM

Hi, I've been into WAM for years however i'm trying to get my girlfriend into it! She doesn't know about my fetish. I have had some success. The other week we was messing about and I suggested we went upstairs with some chocolate sauce (the sort of stuff you put on ice cream) reluctantly, she got into the shower and I started to rub it all over her body. To my amazement she liked it!
A couple of weeks later we got messy with some custard and she wasn't as keen but still seemed to get in the mood! I want to make it a more regular thing and use some proper gunge. I would also love to bring her to the Essex mud event (if its too soon for her this time maybe the next one!!) Do you guys have any tips on how you introduced WAM to a partner??
A couple of weeks later we got messy with some custard and she wasn't as keen but still seemed to get in the mood! I want to make it a more regular thing and use some proper gunge. I would also love to bring her to the Essex mud event (if its too soon for her this time maybe the next one!!) Do you guys have any tips on how you introduced WAM to a partner??