That is odd to hear that a third coat has not provided excellent coverage, Dan! Our Modern Masters Front Door Paint will cover with two coats in most cases, and a third should look perfect. For the best results, we recommend using either a high-quality synthetic brush, or a 3/8" roller. This paint may also be sprayed if desired, thinning up to 10% by volume with water. - Rust-Oleum Product Support 2