Etching Primer and Paint Gun? Options

[9fourteen]

Before I start cutting into the longs and hell hole I was thinking about sand blasting the whole area first to see what I have and then prime it before making the repairs. (eventually I am going to strip the whole tub. just doing it in sections) I already bought a blaster from eastwood. Now I need to get setup for painting so I can prime it immediately after stripping it. I have made a list of the main things I need to buy. I think I got most of it figured out but have questions on the primer and a good paint gun. I have never sprayed paint so any advice is welcome or if there is something i need to add to my list, let me know.

Here is a list of what I think I will need

paint gun
etching primer
fresh air respirator
hood
throw away coveralls
gloves
metal prep

I am sure I will need stuff to mix the paint with. The paint shop guys will help with that.

I am also going to build a chamber to limit the mess from the blasting and over spray in my garage.

I went to the local paint shop and they sell three brands of etching primer, nason, ppg and dupont. They are in order of price. Nason appears to be a low priced dupont brand. It's about half the price. Can I use the cheap stuff or should I stick with the ppg or dupont. Obviously I want to save money but I don't have a problem buying the right stuff if it is worth it and will work better. Actual suggestion items numbers would be welcome.

I was also looking at paint guns. They had a nice 2 gun set from DeVilbiss, one for priming, one for painting, i think it was around $200. They had other guns that were half the price or lower. I think i have read on here that the DeVilbiss guns are the best. (or at least in somebody's opinion they were). Is it worth the extra money or will I get the same results with the cheap gun?

thanks

I know everybody likes post with pictures so here is one.

[jmill]

My flares have been unpainted for over a year without rusting. I metal prep the area after I work on it and it's parked inside on jackstands.

On a side note I just bought a bunch of PPG paint for my car. The guy at the paint store said he couldn't see a difference in the primer ingredients between the shopline and high dollar stuff. He has a feeling they just relabel the stuff. Not sure about this but he knows more about it than I do. I bought shopline primers to save some cash but went with the concept line color due to the UV protection that he said the shopline doesn't have in the color.