If you got access to a compressor, you can get it rock-it-liner for about 100 shipped... I highly recommend using this style, the spray cans and other stuff I've tried over the years are a waste of money.

68 Road Runner, 69 Belvedere, 71 Challenger Vert
340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z
66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram