Yes SPI quit making the HS clear.. It wasnt as big a seller as the rest and when Barry brought out the Euro line, he phased out the HS.. All of the resto clears used the same resin so really it wasnt that big of a deal..
The HS, MS, Universal, and the Euro all use the same resin.. The differences between all of them with exception to the Euro is simply solvency.. While the Euro does share the same resin, it also has differences in the activator iso's used in it, and I believe it does not have as many UV inhibitors in it as the other two...
No way to make it identical to the Universal and MS without charging the same price range which defeats the purpose/reason for the Euro to begin with.. Plus the Euro is a little harder because of these ISO differences which many people like..
It is still a fantasic clear, but the other two are the kings!!!
The 69 camaro Im working on now will get ss and #5100 Euro clear over that.. I like the extra hardness especially over a black car as this one will be
The HS was also not the easiest to spray, and Barry had a number of how many painters could spray it slick... Like 1 out of 7 could spray it well and like it, for the others it was too thick and difficult for them to spray slick.. My numbers may be off but you get my point
You could still use your HS and reduce it with a quality urethane reducer.. The HS was the very first clear that Barry developed.. It was his baby!!!