The 2k lacquer that you have will be far superior to the 1K, the quantities that you have seem to be about right for the job,.
To spray 2k lacquer, you really should use an fresh air fed mask and NOT a respirator, the air fed mask has a compressed air feed from an external source, creating positive pressure within the mask, making it impossible for isocyanates to enter, having said that, I know quite a few people in the trade that only use a respirator, and have been doing for many years, as it seems, with no adverse effects, I would never recommend it, but I'll think you'l see what I'm saying..
If you paint with the garage door down, within 30 seconds you will not be able to see what your doing, due to thick over spray, you must have some sort of extraction going on, which leads to the next problem, If you use the 2K, expect everything in the immediate area to get covered with overspray! that can only be eliminated by claying, or polishing a sure fire way to really upset people.,
I would seriously consider trying to do a bit of a deal with a bodyshop that can paint it and bake it for you...
Tom