I have one grill that has been in use since 1979. Whatever you do, do not bend the vents. They will never be the same. If the vents are bolted on, remove the bolts and soak the daisy wheels to clean. Drill out the rivets, if they are used, and replace them. Stainless steel nuts and bolts are cheap.
Two Weber daisy wheel kettles A: 1979 P: 1993, and an unused ECB