This looks pretty normal from what I can see. Maybe if you feel comfortable, post another picture in better lighting and focus on the spot so it is easier to tell. From what i can see though, this looks normal.
I agree, it looks like a flaky shed possibly. I replied to this the last time you posted it. Do you have any more pictures that are close up ? How is Spike doing otherwise ?
Clapton is acclimating okay I think. He's quick as lightning so I'm not sure how much I should bring him out of his house yet. He's not at all interested in his salad though. I wonder if I should change what I'm giving him. Least he's eating his crickets.
Things to do:
Buy calcium powder
Material to raise surface for basking spot
Scenery decals for back of tank