SPI is good, as is Tamco.
Following the mix sheets I had zero issues with the restoration shop stuff, but then leftovers in the mixing cup are not the metric I used to judge...I sprayed a test piece at the same time and would scratch it daily to see how long it took for a full cure...about a week is right. This wasn't a problem for me though, I sprayed acrylic enamel for the undercarriage/interior/engine bay within 48 hours....ended up with a really tough finish that is very hard to scratch, no signs of delam yet.With the majority having good results with the SPI, just what I wanted to hear.
I noticed that not one person said to buy the pricey PPG VP2050 primer. At about $200 a gallon, not a product I wanted to use unless necessary.
I bought a quart of the TCP global Restoration Shop brand 2K primer. I used it to do the inside of my replacement quarters and underlying structure. After application, one thing I noticed was the 1" or so of paint in the mixing cup did not cure for about a week.
I also have the House of Kolor primer sealer that I used to paint a small bracket with. The contents of the mixing cup was fully solidified the next day. Both were mixed per instructions leading me to not trust the restoration shop stuff.
A bit off-topic, but I noticed the side exit exhaust on your car. Do you have any issues as in too loud or drone with your setup. I see you are using what look like glass back mufflers.
SPI has jobbers located throughout the country so you likely have one local to you. Shipping is always free.The PPG lines are pricey but high quality. I think you’ll find around VMF SPI the go to. I use PPG DP90LF, blocked with UPOL high build, sealed with the UPOL reduced, topped with PPG Omni and cleared with Tamco. It’s been a good stack, budget wise and performance wise. I’ve had good luck with a couple of the TCP Global lines and all the Tamco products I’ve used. Being a phone only order and coming across country are why I don’t use SPI. If I could get it locally on demand I’d use it.