I don't know who makes Summit paint. But if you want to know you are getting, or want colors Summit doesn't have, you can just get Kirker. I think it's about the same price by volume, though Kirker sells 3/4 and Summit sells 1 gallon it's priced accordingly. It's been a long time since I looked into paint but I think I remember that certain municipalities don't sell (and maybe some companies won't ship to?) certain paints due to environmental concerns. If the Summit stuff is affected by that, Kirker might not be, and the place I got my Kirker had no issues shipping it.

This is where I got my paint for my first and only home paint job. I don't know enough about paint to recommend it over anything else, but I have no complaints about it.

https://www.autobodytoolmart.com/pr...hite-ua-81496/automotive-base-coat-paint