I live in Spain and am trying to source a paint to use on UPVC window frames and metal shutters. Can you tell me if Zinsster AllCoat Exterior Silk Gloss is the same as Zinsster AllCoat Exterior Satin. Is Silk Gloss just the european equivalent? In european paint brands they call satin satinado. I don't want to buy a paint that is not suitable and would really appreciate any advice you can give me. Thank you.