Ed:
I like 2 parts paste to 1 part water (e.g., the Pizza Factory sauce calls for 12 oz paste plus 3/4 c. water.)
BTW, how many pizzas you making? I like a saucy pie, so 2 - 6oz cans of paste would be enough for two pizzas with perhaps a tiny bit left. You could stretch it to three if you add a little water or if someone doesn't like their pie as saucy.
HTH,
Garvey
I'm making about 3 pizzas tonight, but I'm shooting for a 3 to 4 pizza sauce recipe, to match my puree recipe that I posted at the beginning of this thread.
So far, I've gone with 1 to 1 and it still looks a little thick.
Pizza Factory must use a plastering trowel to apply their sauce

.
Maybe initial paste water content varies from brand to brand.
After adding my spices and seasonings, It looks like I'll be using less sugar than I use for puree.
I'm going to add 6 more oz of water to make it a 3 water to 2 paste ratio and see if I like the consistency.
So for those playing at home, that's 12 oz of paste and 18 oz of water, plus seasonings.
I'll let you know how it goes, but so far, it tastes like it's going to work out pretty well.