The WX-A offers great flexibility and quality at an affordable price. This "do-it-all" gun will spray both Hardwax for the underbody and Waxoyl 120-4 for the cavities. The WX-A gun is easy to fill and has a large capacity, but when used as a single gun setup, you will need to empty and clean when switching products. If you want an affordable option that does it all, this is it.