Industry was very diverse, with many large factories. Wallaceburg was known as "The Glasstown" for many years. The Glass factory wasn't the largest employer, but it had a huge tower (over 250ft I believe) that was visible for miles. The tower and the factory were demolished around 2000, a huge blow to the town's identity. An earlier major industry was a sugar refinery. Now it's mostly tool and die shops.
You have definitely used products from Wallaceburg. Glassware (variously known as Dominion, Domglass, Libby-St.Clair), Faucets and bathroom fixtures from Waltec (all the old urinals used to say Wallaceburg), Louisville slugger baseball bats, hockey sticks and golf clubs from Hillerich & Bradsby, Food from Nestle, and auto parts for nearly every N. American car.
Here is a list of factories in Wallaceburg that I compiled for a high school project around 1990, with updates that I know of:
Name, Employees (1990), Current Status
Waltec, 652, all three plants closed or closing
Eaton Yale, 603, became Oxford Automotive and then closed
North American Plastics, 515, closed
Libbey St. Clair Glass, 427, closed
Benn Iron Foundary, 419, still operating as WABCO
St. Clair Tool & Die, 400, two factories closed, but HQ still in Wallaceburg
Accurcast, 323, still operating
Nestle Foods, 234, closed
H.E. Vannatter Tool & Die, 135, unknown
Solus Tool & Die, 130, unknown
Hillerich & Bradsby, 100, still operating
Venture Industries, 100, closed
Aar-Kel Moulds, 73, closing
Five Star Tool & Die, 52, unknown
Mylar 2 Moulds, 52, still operating
Active Burgess, 50, closing
Many other smaller tool & die shops
This equals more than 3000 jobs lost since 1990!