if you buy paint off the internet, most places state they are not responsible for broken paint. in the event of broken paint, you would have to file a claim through the shipping company.
as for the heat/cold issue, the paint you buy at the local store comes down the same roads the paint you would order online does. they will both be exposed to the same elements.
dev said it in a nutshell, dont buy online.
you may find a cheaper price. But, add shipping and the headaches of possibly getting broken or bad" paint(dimpled, swollen, 3 years worth of storage) and it is just a hassle.
2001 purple fade timmy- LP mod
MNTN derlin bolt,torpedo reg, check it unimount, Entropy, CP roller trigger, clamshell, adj ram cap