Have had most success removing stickers with this method.

Cover the sticker with 2 layers of thickish paper towel, drench with Shellite, leave it to penetrate the sticker which can then usually be removed whole. Should the sticker be plastic covered it may take 2 tries. Any glue residue can be removed with a clean rag and Shellite, use a rag not the paper towel as the towel breaks apart rubbing over the ply. This method doesn't raise the grain or appear to cause any issues with finishing.