1968 and later Fenders are not entirely AUC (Aliphatic Urethane Coating). What Fender did was seal the body (as always), and then spray the sunburst colors with lacquer. Now instead of using lacquer as the clear coat over the sunburst, they just sprayed two coats of AUC. Also the face of the peghead stayed entirely lacquer, even though the rest of the neck was spray with AUC. This happened because the peghead "Fender" decal reacted with AUC. The problem occured because in 1968 Fender now clearcoated *over* the peghead decal for the first time.