Nearly every part on those trucks will break your foot...or your leg...or kill you...if it falls on you with a fall distance of just one foot. Nothing on them is small or light. Theyr'e amazing trucks and I've been around them a fair amount when I visited a gold mine on several occasions for work. Awesome machines.
I'm surprised that Cat even bothers to paint the inside of the beds. Shoot a coat of grey or yellow primer in the beds and leave it that way because the paint is going to be removed by the payload.