Just flicking through this.yes, 2k does have nasty stuff in it.However,Ive been in body game for nearly 30 years.Never met a painter who uses an air fed system.I use one if im doing a full paint.However,its more for eye protection than anything.The only guy I know who has suffered from ill effects, was a signwriter.The kind who used to stand on a ladder "Rosies florist" type stuff.Long before Vinyl cutting was a thing.A good quality mask should protect you Ok.Think 3M.If you choose to go air fed, your gonna need at least 15cfm compressor with a 150 litre tank.They are very demanding.
If your winging your paintwork, celly is far more forgiving.However for best results, youll need to wet flat between coats (1000 grit) 2 coats of solid 2k, and as long as you dont get huge runs, and a bit of gloss you can get a great finish if your prepared to work on it.2k is the most durable finish you can get, whether solid or base & clear.The base can be over painted in 2k, celly or acrylic.Again 2k & acrylic are more forgiving, but require more work.Porsche factory finishes have always been quality.Never seen an early car with factory "orange peel" yet plenty of new BMWs etc have terrible peel.
Who ever said "leave the factory underseal" was just swerving.Ive just spent two weeks stripping a shell & Panels.The thick seal made by Wurth is just a series of cavities to trap moisture.
Even in areas under what appeared to be undamaged, areas of rust were forming.It has to go.Bead blasting wont touch generally touch it either.if it does it will take an age,and cost too.
Torch & scraper, then zip wheel.Then media clean.
If you want a great paint job do this.Remove parts and strip everything.Strip paint with aircraft stripper,then on solid areas that are difficult to acess,get the area blasted.Ive just had 2 doors, pair rear & front wings and few odds blasted in hard to acess areas (after stripping) was charged an hour,£80.
THEN give all the parts shell if you have to, a decent painter.Youll be suprised how much you can save doing the hard work first.Dont apply paint of ANY kind.One thing painters dont like, is to paint parts that they havent prepped!