David, I use some stuff called Undu for removing labels, stickers, tags, and anything most anything else that has been stuck on. It's one of those things that you see on an infomercial that can't work, but it does. I bought it at Bed Bath and Beyond, and I've seen it at Lowe's and Home Depot. It shouldn't hurt the paint, but I would try it on a small area first. You might be able to reuse the letters.