Please, please don't.
You'll only end up painting them every few years.
Try a power hose.
+1
Power Hose got the mascrete in my drive looking like new. Needs to be a powerful Power Hose though
Using powerwashers to clean driveways is a shocking waste of valuable drinking water and should be avoided imho, it sounds like a lazy mans was of dealing with a problem, surely there are chemicals available for doing the job effectively.
You can do it efficienty with just rain water collected from your roof.
Using powerwashers to clean driveways is a shocking waste of valuable drinking water and should be avoided imho, it sounds like a lazy mans was of dealing with a problem, surely there are chemicals available for doing the job effectively.
http://www.peoplesrepublicofcork.com/forums/showthread.php?t=170629