Help with fibromas on buck

I have been watching one of my bucks closely the last month and a half. I had noticed a while back he got a huge wart-like black growth under his chin, however besides it being ugly it has caused no harm to the buck. I looked it up and came to the conclusion that it's a fibroma.

Tonight however I seen something that worried me. Being that this buck is not all that tame, I seldom get a real up close look at him. We'll tonight he was only 20 feet away and the sunshine was hitting him just right and I could see literally at least 50 or more other growths that were half hidden under his fur. They weren't too large but I fear they will grow in size. I have seen pics of deer that had them so bad that it starts to consume their whole body, and that the last thing I want to see happen to my buck. I am worried if it got that bad it would affect his health, or his value come sales time. No buyer is going to want a completely ugly, wart covered buck, no matter what his rack scores.

I have had fibromas on my deer before, but it is extremely rare, and they never last long. The buck that has them now has what could become an extreme case. Is there anyone expirenced with battling to keep them from spreading?

I got a good look again tonight, he has the one big one on his chin, and one big one on his neck. Other than those two the others really don't look all too bad. So I am hoping that he's all ok and that they don't spread. I am worming his pen for the second time tomorrow and Sunday, I wormed them last of March. I hope the wormer helps prevent more bugs biting at him to spread the virus even more.

Bell interesting story, I will keep mineral oil in mind if I dart him. Thanks