You can get a three pack if Birchwood Casey sight paint applicators. I apply one coat of the white, let it dry for an hour or more, and then one coat of orange or green. Sometimes I apply an extra coat of the orange or green. I've got it on all my revolvers that don't have colored front sight inserts and it helps 73 year old old eyes find the target faster in single or double action. It will sometimes dull on the ones I carry often and in that case I just apply another coat. It works well with me. I paid around $12.00 for the kit.