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.

[9fourteen]

I have another question on the etching primer. If I strip areas on the car and not the whole car as I go around fixing structural/rust issues, if I had applied etching primer to one area a month ago and I am working on an adjacent area and I go to prime it, if there is a little overlap of the etching primer will it mess up the previous coat of primer? The reason I ask is I thought I remember reading something here that if you apply etching primer over paint, which wouldn't make sense, it could eat into the bottom layer and cause it to lift. I was wondering if etching primer over etching primer would cause any issues.

I know the best solution would be to strip the entire car in one shot, prime it then fix the rust areas. In order to strip it properly I would have to put it on a rotisserie. I plan on doing it eventually but I was concerned that the rust in the hell hole was compromising it structurally and putting it on a rotisserie prior to fixing certain areas could cause problems. Maybe I am just being overly cautious. Look at my build thread and tell me if you think I could put it on a rotisserie as is, strip it prime it and then fix it. I would would much rather do it that way instead of a patch work of repairs and prime.