I once bought 50 cans of butane. That caused a stir. Managers got involved, I was asked a whole bunch of questions about what I was doing, it was annoying.
Oh yeah, also had a similar experience with spray paint.
I painted my skoolie (used school bus converted to a motor home) with about sixty cans of Rustoleum. It was annoying as fuck trying to buy the stuff at Home Depot. Like, I'm going to go tagging with fucking Antique White spray paint?
You can simply buy the small charge canisters of them. A twelve pack in about the same footprint as a four pack of beer, and is about 4ish inches tall.