For a while Bell was using a resin that was very prone to water blush, the notorious “Bell blush”. You can make it go away by wiping with an acetone rag. You can keep it away for a while by spraying some 303 Protectant on, but it will make the hull interior very slippery. And of course, the 303 Protectant will go away sooner or later.
If the resin has worn off of the interior Kevlar to a significant extent, the Kevlar fabric may start looking and feeling damp for a while after use. Unfortunately, aramid fibers do not take up resin as well as one would wish. I have used a coat of low viscosity “penetrating” epoxy such as System Three Clear Coat if it looks as if the hull interior could use refreshing. I often do apply a coat of marine varnish with a UV inhibitor over this if the boat is going to see a lot of use.
The way many of us use and store our boats, it would take many outings for the interior epoxy to see enough UV to deteriorate significantly, however.