Has anyone used the Undercoating spay from Duplicolor? I see several types at Autozone and am tempted to get a few cans and do the whole underneath of the truck, bed and all. Anyone else do this, or are there other, better options?

 

Hey Spyder, be careful with that stuff. Just spray the
part of the bed you can see thru the wheel wells.
Or just paint the box showing thru the wheel wells.
I need to do the same, the box isin't the body color on mine.
Looks gray after so many washes, I brush and clean wheel
well every time I clean the wheels.
PS: Don't try on a windy day!