Bones I went to Walmart and got some 3m assorted grits 1000, 1500, 2000, 2500 .
I just found I had 1000 and1500 mixd in with some other grits , I have lower grits with my palm sander stuff
I am assuming thst you wet sand
Like I said I do have other axles just in case I do not like the originals
I can not find 400 so I will start with 600