While I believe the 90th texture was created by sandblasting, you should be able to do a similar version yourself. To me, the surface of that guitar always reminded me of a texturing technique used on walls and ceiling of houses. You apply your "gooey" material, and then spread it out over the surface. By having areas of no material, when you spread it you will end up with voids....
The DBK looks similar, except the only applied a finish, without flattening it out.