The hardener contains "isocyanates", which are very nasty, and will generally go right through a charcoal filter mask.

When you do buy paint, remember the old saying "you get what you pay for". If you don't pay much, then don't complain when it does not last as long as good paint.

I just saw a Corvette I did in '86, and it still looked fresh. I used a well known, but cheaper brand of paint on a Nova a few years ago, and it was failing in two years.