Yellow Assessor sick...

[Whatigot]

When I had a chance to have a good look at this guy after bringing him home from the LFS he had been at for a couple months, I noticed a white milky substance covering his face...
It was not apparent under the LFS light but quite obvious under my phoenixes.

I was a little concerned, but figured I would feed him selcon soaked food for a while along with salifert dry food to keep him vitamin rich and full to see what some good, direct feedings and nobody messing with him (very peaceful community tank) might do to improve his situation.

The milkyness did clear off of his face, but now that it is mostly gone, what is left looks pretty dramatic...

I'll try and get some pictures, but it looks like the same milky white substance has formed on the top of his head...
Doesn't seem to affecting him in any way, still the most active fish in my tank and a big eater but I am concerned with how ugly the affectation is.

I'll snap some pics tonight, but for now this is the best description I can offer and I'm just looking for advice to research and see what some of you more experienced fish keepers might think.

The area affected is the top of the head, the gills don't seem to be affected, just above the eyes and between the gills.
There are white/gray almost cottony looking things, almost like very large ich that seem to be eating away at the fish..
some parts are flat lying, some are protruding above the fishes skin but they are all the same shape/color.

I am pretty inexperienced with fish disease, would really appreciate some help here.
Really like the fish.
thanks guys.