Anyone who has modified a car knows there are times when you need to drill holes in a firewall, or some other bulkhead, and other times when you'll need to fill those holes up. When Rerouting wiring ...
Begin by using your 4-inch grinder and remove all paint, primer, and filler around the hole that you want to fill. See All 11 Photos11 Here are two methods for creating the plug to fill the hole.