Don't know what to tell you about his rubbing it off on the fence, but my mare has a thin-ish mane that I'm trying to grow out. I'm braiding it once a week either in a series of french braids or a running braid. I can't give any specific advice about the product firsthand yet, but I'm also doing an M-T-G treatment to her mane and tail once a week. Here is a link to my thread about it and some pictures... MTG: Love it? Hate it?
I will be leaving weekly updates on that thread to see if the M-T-G is effective. Sorry I can't be more helpful!