The original plastic bodied Carter jacks used by Gibson tend to break. I've seen a number of Gibsons with replacement Switchcraft jacks when that happens. Since the Switchcrafts are longer, the butcher, er luthier, thins out the already thin top more to make it fit. It takes about 10 minutes to mod a Switchcraft to get the proper clearance and keep a thick enough mahogany top (1/4"). The thread length on a switchcraft long jack is 3/8".
2 heavy coats of white as primer shot late Saturday afternoon after sanding for a half hour. Notice small dimple north of tone pot.
Sunday block sanded with 240 and 320 to level everything, dimple filled with spot putty first. About 2 hours work. No picture unfortunately of the bare spots etc that resulted.
In rapid succession Today:light white coat to cover bare spots left by sanding
Frost blue color coat
Heavy clear coat
Total time 45 minutes. I try to shoot white, color and clear ASAP to make sure the layers bond to each other. Two more heavy clear coats later today if the weather permits and then paint cures for a week to 10 days.
Here's a comparison between Frost Blue and the Daphne Blue on my Stratobaster. Fluorescent light
