Building a drill powered spray paint mixer. Thoroughly shaking spray paint is a hassle, this mixer makes it easy. There's a retail version of this paint mixer but I thought it might be a fun little project. Before spinning a can, make sure the metal ball inside is rattling around freely. Power tools make things easier but you could build this mixer with common hand tools as well. See the links below for the parts and tools I used:

I Can Mixx (retail mixer):
https://amzn.to/32YBMkr (affiliate*)

Rubber Coupler:
https://amzn.to/3H5Kige (affiliate*)

2.5" Hole Saw:
https://amzn.to/3u2kX2P (affiliate*)

Portable Bandsaw:
https://amzn.to/3HG5FEu (affiliate*)

Bench Grinder:
https://amzn.to/3bcTDCW (affiliate*)

Multitool Grinder Attachment:
https://amzn.to/3HE3iSY (affiliate*)

*Purchasing from these Amazon affiliate links earns my channel a small commission. Think of it as a tip that doesn't cost you anything. Thanks for the support!