Update on some of my progress (I'm not sure if this is the right thread - if not, please let me know

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I need to reglue the leather to the back of the belt, it keeps wanting to curl and come unglued. I found some boots that I am going to operate on. I made some of the belt gadgets from craft foam, gotta make some more.
I got my order of fabric from Fabricsupplier. It is black with a gray backing...it's kind of like a heavy stretchy knit material. I tried overdying it with some blue polyester dye, but unfortunately it didn't do anything, except make a slight bluish tinge to the gray, but not even really noticeable...So I'll just work with the black.
I also got a PPK airsoft gun off of ebay...I tried to spray it with a more "chrome" paint...I may have to do it again because my son and his friend couldn't leave it alone, and now there are finger prints all over it!
Any ideas for the belt buckle? I don't want to use craft foam...too flexible. I thought of maybe making a mold and then casting it in some kind of plastic resin, but I'm not sure how hard that would be, as I've never done it before.