I have refillable pressurized bottles as well, use them with prepping for my powder coating hobby. My compressor water drier is not that reliable. Much safer to use this on sensitive electronics. Compressor air contains contaminants.
Plus, it was easier giving extra cans to the old man and his friend.
I've thought about using my backpack leaf blower on a few things, good idea! I have a portable air tank that I've been filling at my local FD. It's dried air for use in SCUBA and SCBA tanks. No moisture or oil problems like with my home compressor. I use it to refill my reusable dusters.
I don't really care what YOU think.
I have done a lot of cleaning.
I have a friend in the Marine's that said he did the same in Afghanistan. I think I could really use an M42 Duster to drive when traffic is bad in Dallas/Fort Worth.
And I'll be darned if I can find the cool vid you used to have a link to. That and an A10 Tank Killer vid were my favorite.