E-Tech's C3 Ultra Fine Polishing compound is their finest grade polishign compound. It's intended to be used after their other compounds to bring paintwork and other surfaces back to a flawless gloss finish.Equivalent to 3000 grit abrasive paperSuitable for hand or machine applicationSuitable for a variety of surfacesE-Tech's C3 Ultra Fine is their finest polishing compound. Equivalent to 3000 grit abrasive paper, this is intended to be the last polishing treatment applied to painted surfaces. Suitable for hand or machine application, this should leave surfaces with a high gloss finish read for the application of sealants.It can also be applied to wood veneered interior trim, coated compositesn and gel coated glass fibre.This is a water based compound containing premium grade kaolin.Please note - as with any polish, care should be taken when applying this to the paintwork of your car.