Rubbed inside of both HS skins with ScotchBrite pad, to allow primer to adhere better. Cleaned inside of skins with lacquer thinner, then sprayed DuPont 225S acid cleaner on the inside and washed it off with water. Dried skins off and then primed the inside skins. Trimmed off small area of HS left bottom skin where it overlays the splice angle, HS-614. Trued up skeleton in jig. Clecoed left HS skin to the skeleton.