Hi Doc, go the highest you can get otherwise you risk stripping off too much finish which also means colour. How do I know, found out the hard way on my EX-5 build. Also need to use a cork sanding block and dip it in water after several passes so that you can wash off the slight build up of stuff in the grits. For the curvy bits you revert to folding over and using by hand. If you miss this part it will become trapped and then cause scratching of the surface, same as when not using enough water or even when sanding dry. Handy to have a soft cloth, maybe an old towel chopped up to moisten and use to wipe off build up of water and sanding residue on the surface of the guitar.

You seem to like ordering various bits online and suggest you get the Micro Mesh Guitarist Kit from https://www.thesandpaperman.com.au/m...arist-kit.html

I am using it and happy with the results as it mainly polishes however the 4000 grit can also strip a fair bit of finish off too if you go too hard at it.