Propclean is available in a box of 10 Propclean wipes, for applicator convenience. Propclean is the first step in the Propspeed application process. The denatured alcohol in Propclean ensures that the metal surface is now completely free of contaminants and ready for Propprep. 1 Propclean wipe will clean a propeller of approximately 33-66cm, or 13-24", in size.