It feels pretty hard. I'm not sure how bad it would be to take off but I usually blast it off, sure beats sanding it. I've dropped my keys on it and things rub up against it that I thought would scratch it but it hasn't. At my buddy's job, the painter paints with the something similar to what I used on forklift masts and it is pretty durable. Here's a larger pic
97 TJ 4.10s, 33s, 4" Clayton.
"TJ's and CJ's are Jeeps. BJ's are something else entirely. I can only help you with the first two." Sundowner