Mr. Finishing Surfacer 1500 Gray is a finely textured satin primer, recommended to be used on areas that will receive a glossy finish at the end. (Alclad2 for example). If we use the standard primers, such as Mr. Surfacer 500 for example, we will have to polish the standard primer to be able to build up the shine on the Alclad basecoat. We can remarkably reduce these efforts when we use a primer which is more on the shiny side if that makes sense. Can be thinned with Mr. Color Thinner and Mr. Color Levelling Thinner.