Im trying to repair a scratch on my quarter panel thats about 3 inches long. its showing primer, but no metal. What is the best way to touch this up? The color is azure blue. Ive watched a few videos on it, and looks like I need to apply the touch up paint, let dry, apply clear, let dry, then wet sand and buff. Is this correct? any info or tips would be great? Also where is the best place to order the touch up paint from? Thanks in advance