I would get yourself an IR thermometer, I found it essential when I did my respray. You'd be surprised how hot a black panel will get on even a cloudy day, unless it's really windy it will get a lot warmer than ambient.just ambient temperature so about 17-20 degrees outside, seems pretty good not hot at all thanks to dull english weather.
it’s so dry i couldn’t get a run if i tried, definitely seems worse at an angle doing the bonnet than on the scrap front wing test panel i have. i’m gunna give it another go next weekend and go through absolutely everything and if it still doesn’t work i’ve got to try a different gun and/or compressor.
Non iso proper 2k paints have been around for at least 10 years. They're not what you want to be breathing but there are no worse than celly etc, so a well fitting full face respirator with abek2p3 filters is more than adequate to protect your lungs. The one's I'm aware of are HMG nisocoat 2, ultrimax 2 and Cromadex 800. They use a type of epoxide hardener but are a 2k acrylic- really not sure on the chemistry but it does seem to be a polyamide hardened 2k acrylic. Nisocoat data sheet says you can use either standard 2k thinners or epoxy thinners. I went with 2k thinner as there were different drying speeds (slow is best, perhaps even extra slow). The downside to them is really that they don't atomise as well as isocyanate 2k and seem to flash off quickly. All good if you're painting the car piecemeal but spraying a whole car in one would land you with a lot of wet sanding and polishing. Like other epoxy paints, full cure takes some time too. 1-4 weeks depending how thick you put it on, but rest assured it does go properly hard unlike "2k converted" paints. Even thick runs go hard. The slight application issues is why they're sold as tractor/ machinery/ industrial paints. Considering they use epoxide hardeners, there doesn't appear to be any weathering or UV issues. Apart from some swirling due to constant battering from mud and road dirt etc my car is as glossy as the day I painted it and has been sat outside 24/7 for 2 years.I suspect and hope its the way forward, developing non Iso hardener. Iso 2k has been around for the best part of 5 decades now and contrary to our American friends HSE standards, it is harmful to health. Water based paints were supposed to eradicate the danger but, and I'm sure Parm will agree: Anything other than fresh air in the lungs can be harmful, water based paints are not thinned with tap water and they still need a 2k clear to seal and protect the colour. I'll be fully retired a year or so from now and am from the generation of old skool painters who would drink a pint of milk then blow a car over in celly because it was better for the health, but future generations, I'm sure will have and deserve healthier lungs than I have.
Nick