Some pits are just too deep to get out and it's up to you how far you go. It's hard to tell from pictures how deep pits are but from what I can see I would say you could go some more. I rarely go down to the grits you are using myself, 400 being my usual starting point for something that needy. The reason is because the scratches for 60 are as hard to get out as the pits,(almost). If you use just paper you still have a long row to hoe. When you start using finer grits you are satisfied with the pits you can see or wasting time. Going back makes at that time wasted. What I am saying is if you want more pits out , get them before you move finer. Change direction with each grit so you can see what your leaving behind.