This one is a bit embarrassing.....when I have to spray multiple items on my turn table I place them so that the overspray falls onto surrounding items and ones at the back...done this for awhile now and it really makes a rattle can go a LOT further.
I do this with Ballistol
Love Ballistol!
I buy it now in the bulk size and put it into a stove atomizer pump cleaner bottle...so much cheaper than the aerosol cans.