I plan to shoot my firewall and underbody this week. I have some PPG DAR9000 satin black that I had made a long time ago. Well PPG discontinued this acrylic enamel Delstar line. I don't have the DTR reducer - what would be a good substitute?

 

The DT line of reducers will do just fine.

What you really need is the DXR80 hardener, which is not only discontinued, the last known price was $180 per pint.

 

I have the hardener