Wet and messy clothes can cling so well and be peeled off. Both ways work though. Strip before gunge allows a good sight of what's underneath the clothes before getting covered again.
The best ones I see often are random chance - builds suspense. The trick is to not use too much gunge until you're naked (or as far as you'll go, which judging from previous content will be that!). Let's people see some skin which is always good. Then when naked, go crazy with the goo. Hope it goes well!!
With regards to clothes and colours, if you ask 100 people on here EVERYONE will give a different answer, so go with what you feel comfortable and sexy in, and perhaps pick 2 colours of gunge that are a bit of a contrast? That's why I love using blue gunge and custard when I get a chance with the wife!
For me (and many of us) clothes have to get messy. This triggers the humiliation part of the fetish, where the person getting the unplanned mess has to decide to go back home in dirty clothes.. partially rinced clothes.. naked.. or borrow some other clothes. You will often see the model reaction beeing a oh no!! because of the trouble coming with messing her set of clothes. The clothing part of the fetish is so important some sites have been doing well with No Nudity for over 20 years.. (mostwam) . People will have their individual preference of Formal, Casual, bikini, winter clothes.. all of which have their own audience.
Btw you look totally awesome in the messy preview you've shared! can wait to follow whats next.
I think everybody is going to have a different answer but generally I would think that it would be a few gungings before the first strip and then alternating between gunge and strip after that. At least that is my opinion.
I have little interest in clothed WAM personally and so I've always preferred strip first then gunge. I want to see what the hot girl looks like before she gets covered in gunge!
I think it's most interesting when you strip some to avoid gunge and then get some gunge and have to make this decision of "Do I want more mess? Or can I be a bit more naked to avoid it?" Makes the decisions feel like they have some consideration and seriousness!
Your sample photo is from a video I particularly like. You start clothed, and some mess goes inside your t-shirt until it is a slippery clingy mess. That's when I like to see a girl pulling on the fabric, maybe sliding it off of her body, then back in place, sort of teasing. Perhaps more mess, more peeking under the fabric, then it comes off. Same with shorts or skirt or whatever is at the bottom. A skirt sliding off that has to be slid back up is sexy too. Finally, eventual nudity is a good way to end things. Laying in the mess is nice, sort of resigning oneself to being fully messy and all the feelings it might bring.