If you are looking to hire a roofing contractor to restore your commercial or industrial roof, use manufacturer approved applicators. Make sure they are an established, licensed and insured roofing professional. Ask for references and check them. Talk to their customers.
Don't hesitate to call on out of state contractors if you are unable to find one in Oregon. They may have a better track record and higher efficiencies to offset any additional costs they might have. Make sure the quote you receive includes all required work, so you don’t get surprises later on. Discuss warranty options.