Wheaton work leans residential, with a steady share of civic and commercial jobs. On the residential side it is iron fence and railing repair, gate work, and decorative metalwork on homes where the ironwork is part of the look rather than an afterthought — which means a repair that does not match is not really a repair.
The commercial and institutional side runs to handrail and guardrail work, structural repairs, and fabrication for contractors and building maintenance crews who need a part made to fit an opening that is not quite square, because almost none of them are.
Straight answer: railing that moves when you lean on it is a safety issue, not a cosmetic one, and it moves to the front of the schedule. Say so when you call.
Carol Stream borders Wheaton to the north, and the work shifts with it. The industrial parks there generate rack, dock, and trailer repairs rather than the residential ironwork Wheaton is known for, so if the metal is on that side of the line, start with welding in Carol Stream.