P
On a plastic hood. I have a JD L110, regular 18 hp riding lawnmower that I retired from years of lawn mowing and made it into my "Gator" errand machine, removing the mower deck and installing all terrain, soft riding (2 ply ATV studded snow) tires....that was at least 15 years ago.
A new V twin engine went in at about 700 hrs with it currently having about 1300. Early in its life, while still used as a mower I got hung up on an old fence post stub and damaged the hydro drive. I took the transaxle apart (my first time into one), found the bad parts, contacted Tough Torque, got the parts and a free "gimmie" cap and so much for that problem.
In the conversion to a Gatorette, I installed a (large, high sided) metal bottom tray out of a freezer on top of the hood (covering the engine) using a couple of stiips of the plumbers roll of flat, punctured, metal tape and some sheet metal self tapping screws, screwed into the plastic hood.
Over the years, I've carried all sorts of items in and on that basket including at times a pair of 6x8x16 Cinder blocks and just yesterday my 12' step ladder.
I have had to reposition the mounting screws over the years but the bonnet is dirty, worn and ugly but at least 85-90% intact from when it was new. From my standpoint, the only reason I would be worried about a plastic hood on my tractor was if it was a hard freeze and for some reason I whacked it. Under that condition it might crack....I don't know.
HTH.