Though I have not had my Voyager sliders long enough (only a month) to experience what Surfrider has, I had heard that this can be an issue. I bought them expecting to need to re-do the power coating (or not) after a couple of years because eventually rocks and stuff are going to take their toll. In reality, I need to have a fair bit of work done at the end of each off road season to fix cosmetic issues. Pin strips, gouges, windshield chips. But as my wife says, "That's why we bought it."
I didn't do the install myself. But I could clearly see where an extra set of hands, a good jack stand, a good bottle jack, some chunks of 4x4 and 2x4 or whatever would have been very useful if not necessary. Even with an extra set of hands you'll probably want some things to support it as you move each one into position.