I used Totally Awesome cleaner (full strength) to clean up some parts recently and it almost killed the grass where I was working. If it's not good for grass, I won't use it on the outside of my TT since I store it in a field area on my cousin's farm.
2011 Rockwood Signature Ultra Lite 8293SS, 12K Equal-i-zer
2016 Ford F-250 XLT SuperCrew, 6.2L, 4x4, 6'9" bed, 3.73
2010 Rockwood Roo 23SS (2012 - 2014)
2009 Ford F-150 XLT SuperCrew, 5.4L, 4x4, 5'6" bed (2012 - 2016)