/cgl/ - Cosplay & EGL

Looking into 3d printing some stuff for the first time and have a couple questions: Is it possible to resin cast something you've 3d printed in order to make many more copies, say for cosplay jewelery pieces, repeating prop elements etc? If so, is there anything I should keep in mind when preparing a printed piece for mold casting aside from proper sanding and cleaning?

Pet peeve of the day: People on ig with cosplay usernames/accounts but you have to scroll down like 3 pages to find any cosplay related content amidst their food pics, bad fanart and memes. And then they wonder why they arent getting as many followers as other cosplay accounts.