If you’re thinking DIY then I’d look to Raptor as a known kit. It holds a shine compared to Monster.
If you’re looking to spend the ~$5K++ any quality spray shop will quote you, I’d pop the extra $$$ for the UV stable (premium) Line-X. And I dislike Line-X.
The harder the urethane compound, the more shine the surface will keep & shed dust, and Line-X is far harder across the board than Rhino liners for the big name franchises. The premium is so hard it is slippery when wet, it’s that glossy.
What do you think of pulling all the cladding & either foil/furnace tape or use big pop rivots in the 150 ka-zillion holes, and DIY the Raptor in a color same or slightly darker than the silver (or black) of the plastic cladding & leave it all just below that beltline?
—Then, even dirty it’ll still seem decent & now you also rustproofed the worst issue the 450’s have —
(IMO, if you look in my Album you can see in pics my old 450 done this way)
Mine was all big poprivots, and Rhino is thick enough you had to look to see the poprivot heads - If I didn’t say how it was done, you never would have known.
The black 450’s don’t have clearcoat (that I know) - so not like you’re flaking off clearcoat like dandruff, no real reason to line the hood & roof.
Also, a lined hood ::needs:: new shocks/lifters, ‘cause it’s heavy as he!!.