40 Custom manufacture of machinery for blasting, cleaning, coating, etching, descaling, deburring, dust collecting, profiling, finishing, cutting, sawing, abrading, scarifing, painting, and peening metals; surface preparation and finishing services, namely, blasting, cleaning, etching, polishing, descaling, deburring, dust collecting, profiling, finishing, cutting, sawing, abrading, scarifing, dust collecting, painting, and peening metals