I don't mean to be harsh, but indoor ranges require maintenance. Mostly they get neglected, over the years. Get those kids 3M masks, rubber gloves and contamination suits and put them to work. There are special vacuum cleaners that help, but mostly it requires manual labor and common cleaners to clean up. There are grants available from various pro-gun groups to help with funding. I'm not opposed to contributing, but I would have to know exactly what the money would be spent on.