We have a 10sqm outside patio/walkway which is quite old concrete... we ahvent the money to get decking nor get a new screed of concrete... so option we wanted to go with is to paint the outside concrete... as it will be walked on I wasnt sure what paint to use... can you simply use a few coats of exterior masonary paint? or will that just get ruined when you walk on it etc? any advise is much appreciated