If you pop into a panel shop get a cash price to repair the dint. Should well and truly be cheaper than your excess. It is not a hard repair, I do one in that spot every two weeks or so!!
The air fittings for the Shultz gun just screw On and off so just use one off one of your air tools. Your Compressor should have a regulator, but I prefer to use one attached to the gun. They are fairly cheap, and can be bought at a paint supplier. With the air pressure it only needs to be high...
Definately better getting your suspension done first. Will have a much better ride quality plus a substantial increase in lift over 11 year old stock suspension.
We're no chance of winning, but we are much better off with Boofa in charge. He won't be scarred of telling the likes of Warner that they aren't half as good as they think they are!