Think about getting it Zinc sprayed after shotblasting, then powder coated in semi-gloss black, looks great and if you wax the insides it should last well, as long as it wasn't a disaster to start with.
My spare chassis was done like that 3 years ago, still sitting outside waiting to be fitted, but no signs of any deterioration in the external finish.
It's parked on its side so any rain water runs out.
Baught my ticket in advance, £8 .... wasn't impressed with what I saw .. as always at these sort of shows, absolutely nothing for a Freelander, unless I wanted stickers!
I agree with the earlier comment about "Winch and Bumper Show"
Although the girl in the skin-tight 'Merlin' outfit made my glasses steam up a bit!!