The best tool for paint stripping in my book is... brake fluid. The one used in cars. You can buy it at any gas station and at many run-of-the-mill supermarkets. It is designed not to damage metal car parts or plastic pipes but also to prevent corrosion and remove impurities.
Folks at Games Workshop love to put skulls all over anything. We in Central Europe understand their liking. It comes from an ancient Christian invocation: Terminus nulli cedo - The end (Death) bows to no one