That's exactly what was happening with my paints too. Stirring is definitely the best way to go with the little jar of paints.
Beachhead's vest is the ROC Sgt. Stone vest with various pouches added to it and some modding of the itself. I had to shorten it by cutting the bottom off all the way around so that his belt would at least show. Then, I had to cut out sections from underneath the arm holes so that the vest would fit more snug. I went on and and thinned the area on each side of the cut where I removed the section of the vest underneath the right arm hole. I thinned each side of the cut enough to allow the pouch to sit in the vest a little bit and not just on top, and then I glued the pouch in place in order to hide the newly made seam and hold the vest together on the right side. For the left side, I did the exact same thing, except that I dremeled a hole in the front half of the vest and used a pouch that had a peg, so that it allows me to be able to remove the vest without having to peal one of the pouches from the vest and glue.
I wasn't sure how it was going to work out when I first started, but it worked out better than I had imagined, as I've removed the vest several times without the parts that I glued together coming apart and the peg and peg-hole function like I had hoped.
i have glued things , and as though it seemed it was on for good, plus i even clamp it with tweezers while drying, i still had things pop off. i thought for sure the glue worked great on that type of plastic. i don't glue to many things on no more, it was elite force pouches and shit like that.