I have a decking cleaning and restaining job to quote for, thinking of using Hypocholrite mix to clean the wash of with standard hose. The decking isnt very green but its existing stain is basically faded in areas and is patchy, will the hypochlorite help with removal of existing stain so I can stain again from scratch? or what is better to use? the area is about 5X4 meters with bannister and abo…