Gene,
I have a Luverne chrome & stainless steel grille guard on my 91 that I bought and put on the truck when it was new. The grill guard still looks like new. My truck has always been garage kept and of course it is always dry out here in the desert, but I am pleased with the guard. My . 02 cents.
Jerry
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91 W250 4X4 LE, ARE Campershell, stainless running boards, Grill guard, K&N, A/R Nitro 16X8 wheels, Bridgeston Deuelers, Air Bags, 16cm2 turbo BD performance injectors, BD 3. 5" exhaust, tweaked pump