Methods for coating substrates

A method of coating a substrate, the method comprising the steps of;

• coating the substrate with a primer to form a primer layer, wherein the primer comprises a primer conductivity additive, a primer adhesion promotor additive, a primer binder, and primer volatiles;
• flash drying the primer layer such that the primer volatiles are present in the primer layer at a concentration of about 20 weight percent or less, based on a total weight of the primer layer, wherein the primer binder is uncured;
• coating the primer layer with a total color coat layer prior to curing the primer layer;
• and
• curing the total color coat layer and the primer layer to form a cured substrate coating having a substrate coating percent transmissivity of:
• (1) about 0.02 or less at wavelengths of from 280 nm to 400 nm;
• (2) about 0.10 or less at wavelengths of from 400 nm to 430 nm;
• (3) about 0.25 or less at wavelengths of 430 nm to 470 nm;
• and (4) about 0.5 or less at wavelengths of 470 nm to 500 nm, and wherein the primer layer, when cured, has a primer layer percent transmissivity of:
• (1) about 0.025 to about 0.05 at wavelengths of from 280 nm to 400 nm;
• (2) about 0.15 to about 0.5 at wavelengths of from 400 nm to 430 nm;
• (3) about 0.30 to about 1.0 at wavelengths of 430 nm to 470 nm;
• and (4) about 0.6 to about 2.0 at wavelengths of 470 nm to 500 nm;
• wherein coating the substrate with the total color coat layer comprises:
• coating the primer layer with a first color coat comprising a first activation additive to form a first color coat layer prior to curing the primer layer;
• and
• coating the first color coat layer with a second color coat that is free of isocyanate to form a second color coat layer prior to curing the first color coat layer, wherein the total color coat layer comprises the first color coat layer and the second color coat layer.