Profile: Excell Models & Prototyping, Inc. specializes in precision prototypes. We provide models, prototypes and production parts. Our capabilities include RTV molding, CNC machining, vacuum forming, machining, painting, vacuum metallizing and shielding. Our 3D systems SLA-3500 machine uses a high-powered laser to solidify a liquid resin to form a product. We finish the product in different ways including polishing, painting, sandblasting and chroming.