I would paint them and then put on the anti-skid stick-on strips.They can be replaced when they wear and the kids won`t slip ,fall and bust their heads on the side of the truck !!

There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!