Shedding/White Skin

Is this shedding? (FYI - my 1st cham... just want to make sure he's ok)
Can I feed him superworms bigger than the distance between his eyes?

here's a pic of him showing his colors. he is a flap neck.

yes, he's shedding.
and avoid feeding him oversize insects.

but yes you can feed him larva that are a bit longer than the space between his eyes. Especially the really softbodied worms, like silkworms.