This is really an interesting subject...
A "must"? No. But I bought my Scamp
new in 2010. I've waxed it once a year since with Protect All and it's still shining. It sits under a carport when not in use. And for what it's worth I do NOT use a "buffer" on it. Just lint-free polishing rags because it's not chalky (requires more stringent polishing/waxing methods). IF you keep it waxed, you shouldnt have to worry about it "chalking". Mine is 5 + years and counting.
Maybe some DONT care what their trailer looks like to others. I do. If I was a loner/boondocker maybe I would feel different (MAYBE)...I doubt it. I also care for my home like I do the Scamp. I've driven by TOO many houses and look at the "neglect" and wonder WHY??
I've seen SOME Scamps that you can tell some people absolutely do not care one ounce what their trailer looks like as long as it ROLLS! Nasty doors (interior..especially the bottom...another story..I fixed that on mine if anyone is interested), bugs ALL over the front with no hint of caring to remove them. I've had people ask me...just this spring in Gulf Shores... "..is this new?". Fanatic? Maybe. I even carry a spray bottle of some carnauba-based wash/wax mix to remove the bugs at a campground.
I've been laughed at. No matter, I will keep it looking as new as possible as long as I can.
Again, after viewing many Scamps (and SOBs), with some, I've told my wife that if ours EVER gets to looking like that (from neglect and not caring), it's OUTTA here! I meant it then and now.