We have a handmedown gas grill that is rusting to all get out. I just cleaned it again and noticed that there are big flakes rusting off. Also, the igniter doesn't work and I've cleaned it out as well as I possibly can so I think it may be busted and not just full of grime. We're grill novices (and not real regular users) and I have no idea if we're ok to keep grilling on this puppy? or if it's time to throw in the towel and buy a new one.