Is the paint by chance a max sabino? My max sabino has a Medicine Hat but the sabino gene has "roaned" it out. The inside of his ears is still solid red though. You can see the red ticking on his ears and the black mottled skin.
I highly doubt it. He still has color on other parts of his body - namely a large patch of chestnut on his flank and butt but the rest of him is blindly white. He does have natural black eyeliner though. His ears are white both inside and out.