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. 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!