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I am not sure about spraying on foam so I will defer to others on this subject, however when I painted my rails this is what I did and it worked well. <br /> <br />Take 3-in-1 oil and put a light layer on top of the rails and all the points. Paint your rails, let them dry throughly and then take a rag or paper towel and clean the oil off the top. The oil should not dry or evaporate as long as you don't wait more than a day or two. Be liberal with the oil and make sure you get a good coating on top of the rails. Finish up with a Bright Boy and there you go. <br />
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