On many "recent model RV's" (2010 and newer) the aluminum or steel "diamond plate" was replaced by a plastic version. The manufacturers claimed "weight reduction" as the reason. My guess is that along with weight, the "thick tape that looks like diamond plate" is also much cheaper. As for "melting", well, plastic melts as fast as (or faster than) fiberglass, so appearances can be deceiving, so tap on that diamond plate and ask, "Is it real or is it Memorex????"
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John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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