hello all. i've had some parts made for my rock crawlers using water
jet. but the water jet leaves abrasion marks and also there are
scratches on the material most likely from handling. anyway, i'm
trying to increase my parts quality to this level:

http://www.thecrawlerstore.com/image...hop_bumper.jpg

what are some good cutting process and material specs to get this type
of part quality. thank you for all your input.