Not really sure... The diamond plate on the front (and the sides, too) on my 210WBS is apparently glued up to the trailer with, what appears to be, trim strips that are most likely screwed/glued and then, themselves sealed with sealant to prevent water incursion behind the trim strips. I have no apparent staples or screws in any of the edges. The trim strips are most likely the type used in the auto industry...a base that is screwed and glued down and then a half round snapped into a retainer system. The only "free edge" on the diamond plate is the bottom edge; it is bent back and there are screws into a tack strip on the lower edge of the trailer.
The only edge that I could see coming loose or not attached at the factory should be that lower edge...the screws in mine are short (~3/4") phillips heads, maybe a size 6, definitely not an 8. There should be a wood backing strip that these would go into after bending the lower edge back (the screws go up from the bottom edge under the trailer). I would be very leary of using staples...very difficult to get the holes from a power stapler to seal up against water seepage, or do it in an attractive manner anyway.
My 2 cents, your mileage may vary...
2 Cats; J-Lo and Ragamuffin :R
2014 Thor Tuscany 40RX DP
2011 Ram 2500 Longhorn CTD HO
2011 Keystone Cougar 318SAB (now gone)
2008 FunFinder X 210WBS (Sadly gone)