A bronze plaque's tarnish in Illinois usually points to something specific nearby — winter road salt, industrial exhaust, hard limestone water, or plain river humidity. Restoring the plaque starts with pinning down which of those is actually responsible, since the cleaning method changes depending on the answer. Tending restores bronze grave markers statewide, backed by $2,000,000 in liability insurance and membership in the ICCFA.
Road Salt Chloride Near Chicago
Illinois spreads well over a million tons of de-icing salt most winters, a large share of it in the Chicago area, and chloride from that salt doesn't stay confined to the roads. Runoff and windblown spray carry it into nearby cemetery ground, and chloride ions attack a bronze plaque's protective patina in a way plain moisture never does, working past the surface to pit the alloy underneath. A plaque near a heavily salted road or parking area can show pitting corrosion years ahead of one in a quieter part of the same cemetery. How much salt goes down in a given winter tracks directly with how much snow actually falls, so a plaque's chloride exposure can shift noticeably from one year to the next. Tending's technicians grade that pitting from submitted photos before choosing a solvent strong enough to reach it without damaging sound metal nearby.
Sulfur and Soot From the Coal Country
Coal has been mined and burned across central and southern Illinois for more than a century, and both mining operations and coal-fired power plants release sulfur compounds into the air. Rain picks up that sulfur and deposits a fine acidic film on exposed bronze, and that film chemically bonds with the surface, actively darkening the metal underneath it. Soot from the same sources settles into recessed lettering and mixes with the tarnish, and the combined layer can look severe even when the metal underneath comes clean once it's stripped. Crews grade coal-belt plaques by that combined sulfur-and-soot pattern before stripping, since treating it as ordinary oxidation leaves the acidic residue behind to keep working under a fresh finish.
Hard Water Scale in the Driftless Limestone Country
Cemetery irrigation drawn from groundwater in the Driftless hills of northwestern Illinois picks up dissolved calcium and magnesium as it moves through Paleozoic limestone bedrock. Every time that water evaporates off a flat marker, it leaves behind a chalky white mineral crust that can obscure engraved dates within a single season. That crust traps whatever's underneath it, including early-stage corrosion the family never gets to see until the scale comes off. An acidic descaling solvent dissolves the mineral bond without touching the bronze itself. How much scale builds up depends heavily on a marker's distance from the nearest sprinkler head. A plaque that catches direct overspray every watering cycle can crust over within a single season. One set back even a short distance can go years with barely any buildup.
Humidity Near the River Confluence
Cemeteries near where the Mississippi, Ohio, and Wabash rivers meet in far southern Illinois sit in some of the most humid air in the state most of the year. Constant moisture keeps a bronze surface from ever fully drying out between rain events, and that sustained dampness speeds up ordinary oxidation even where no salt or industrial pollution is involved. A plaque here can pick up a heavy, even patina within just a few years, purely from that constant humidity. Tending applies the same grading and stripping process here, adjusted for the slower, even corrosion pattern this kind of humidity produces across the whole plaque.
Bronze Grave Marker Restoration Costs in Illinois
Plaque size and how far the corrosion has progressed, chloride pitting, sulfur film, mineral scale, or humidity-driven patina, are what the calculator uses to set a price from submitted photos. Where in Illinois the marker sits doesn't factor into that number, and it doesn't change once the job is booked. A before-and-after set of images lands in the Tending app once the wax cures, and that's usually how a family confirms the job without driving back out to the cemetery.
How Our Bronze Refinishing Process Works
- Sorting Out the Corrosion Type Submitted photos tell a technician whether chloride pitting, sulfur film, mineral scale, or straightforward humidity patina is behind the discoloration, which decides everything that happens next.
- Cutting Through to Bare Metal Whatever's failed comes off with a solvent built for that specific cause, down to bare copper-tin-zinc alloy. Patina that's still healthy is left alone.
- Repainting the Recessed Letters New pigment goes back into the recessed lettering, and a fine abrasive brings the raised surface back to bright metal for contrast.
- Locking in a Wax Finish Microcrystalline wax seals the plaque against whatever caused the original damage, salt, sulfur, or mineral exposure. A set of cured, finished photos gets uploaded to <a href='/app/'>the app</a> before the crew leaves.
