Euro mount turning pink

[ThreeOhSeven]

I have a euro bull elk mount that lives outside in my entryway corridor. It doesn't see any direct sun but gets wet from rain and snow throughout the year.
I recently noticed it is starting to discolor to a pink/ red hue in some areas of the skull. I can only assume it is some sort of bacteria that is starting to grow. I took it down, tried pressure washing and scrubbing with a brillow pad. It did not help. I left it out in the sun to let the skull dry out and it seems like the sun exposure did help some areas.

Has anyone experienced something similar? What is the best course of action to clean affected area? I'm not opposed to re-bleaching the entire skull, but exploring all options first.

 

[NRA4LIFE]

Bleach and then heavy duty peroxide, the stuff you get at the beauty salon suppliers.

 

[Krolly]

I would not use bleach.
Not sure if the skull was sealed but that’s probably what is discoloring.
I’d skiff it with scotch brite pads. Wouldn’t hurt to use a little acetone to clean anything off.
Get basic white powder and 40 volume developer. Mix to a milkshake consistency. Cover the skull with the paste. Can use painters tape on the bottom of the antler burrs to prevent them from whitening. Wrap in clear food wrap. ( Saran wrap). Leave overnight. Can set it in the sun, heat helps but you don’t want it to dry out. Rinse with warm water. Let dry and should be a lot better.

Amazon.com

Amazon.com

 

[Habitat#1]

Theres a chemical you can get from Van Dykes that works better than bleach and peroxide