Once you do a few, you will start to be able to tell when you get through the outer panel. You could try and spread the panel a little too so when you do go through the first one, it will pop apart.

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