i got a local sheet metal shop that will brake steel for me and roll it. I helped my bro in law fab a truck bed for his rat rod. they did a 1.5" complete tube roll on the top then a 35* brake. gave it that rolled edge at the top of the truck bed. took a whole sheet and make an entire truck bed side. depends what thickness your sheet is and how tight you want the roll. might be able to do it at home but i think i would take it in to a shop.
not sure what part of WA your in but the place i use is in Tacoma,
Schnider Simpson Sheet Metal. They are awesome guys there and they do sheet metal fab on a commercial level but they like helping the back yard hobby guys.
