Dtm is direct to metal primer. The stuff im using is a DTM/highbuild/non sanding sealer depending on how you thin it out and such. As far as a resporator thats why im not spraying this weekend my paint shop was closed so i couldnt get the correct type of resporator. I dont think the ones they sell at lowes is good enough. For the primmer im just using a cheap harbor freight gravity fed gun. Ive used them before with pretty good results and tis just primmer and is going to get sanded down.
The damage on the door is very minimal. I actually was able to just hammer and dolly it out. Its the rear quarter that is going to take the most work but since im going to be zging the car it actually saves me alot of work