To properly blank a deck, a power washing machine with a PSI fluctuate of 2500 to 3000 is good

https://foxtrot-wiki.win/index.php/Understanding_Pressure_Washer_Efficiency:_How_Many_Gallons_Per_Minute_Do_You_Really_Need%3F

To without difficulty smooth a deck, a stress washer with a PSI wide variety of 2500 to 3000 is right. This pressure stage successfully removes airborne dirt and dust, filth, and mildew with no damaging the timber