Vito
Many of our club members are sold on the following mix, and I plan on using the same when I do the hood area on my truck this winter.
1 qt. of Rustoleum gloss Black
1 qt. of rustoleum Flat Black
This equals a perfect color of UHB. You can used pints if you want a smaller amount.
Mix together and add min. sprt. as needed to thin to your liking.