ISO-free primer

[dracko]

After getting some crazy quotes to do the bodywork and paint on my ‘64, I decided to take on the work up to paint and then my buddy is gonna paint it in a booth at his shop.

I am working in my garage...in the Canadian winter... so airflow while spraying is limited. I keep using fresh charcoal cartridges and move the air best I can while still keeping the garage at painting temps and not blowing myself up.

So far I’ve avoided Isocyantes with epoxy and polyester primer but now the truck is blocked to 180 grit and ready for a 2K urethane? I can’t find any that are iso-free ....that I’ve heard any reviews on. Looking for recommendations from painters.

Anybody used a iso-free primer that has decent fill capabilities, easy to sand and compatible with most paint systems? I’d like to fill the 180 scratches.