I wash and wax my truck, dress the tires, clean all the glass. But, the running boards never look clean. I get all the dirt off of them, but they don't shine. I have used tire foam on them. They look awesome after that. I don't use the boards but my wife and kids do. They complain because they are slippery as heck after I foam them. Any ideas on what I can use to make them shine but not slippery.