Hi Bsy Bug, that coconut cake looks great! I think you're right on the spot with your idea to just use a fork to score the fondant. I was thinking your could also use what we call here in the UK "steel wool" (it's a household tool for scrubbing pots and pans!). Get a fresh one of these and emboss the fondant with it to give that "hairy" coconut effect. Then use the fork also. Hope this makes sense!
Thank you CakeGeekUK. I did not think about steel wool. Will give that a try.