How do I sand and prep a print for assembly and painting?

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Hi y'all, I had someone print this for me for a cosplay I'm doing (Kiruko from Tengoku Daimyoku/Heavenly Delusion) and I was wondering if I could get some advice on how to prep it? This is my first cosplay and I don't own a 3D printer myself, so I'm not sure what I would need. I eventually do want to buy a printer myself but for now I just want the materials to process and prep the prop. Print is PLA, I think I would need to sand, prime and paint it, as well as a glue that's safe to assemble it and any magnets I would need for the "batteries".   submitted by   /u/NotPoggersEggers [link]   [comments]