This is somewhat related to my thread on mixing candy paint with the SPI intercoat clear, but I thought I'd post it as a separate thread because it applies to other custom paints I've mixed and need to store. The only paint cans I can buy locally without a lot of hassle are at the hardware store and they are all lined paint cans - they have a grey coating applied somehow to the inside presumably to keep them from being rusted by water based latex paint most people use them for. I've always worried that if I use these cans for storing automotive paint - like candy colors I mix up that have a lot of reducer in them - the strong solvents will over time weaken this coating and it will end up in the paint. As a result I've gone to the trouble of getting unlined cans elsewhere (Barry even sent me some once). Does anyone have experience storing automotive paint in the grey lined paint cans, and is this safe to do?