hello if the area isn't to big you could use a power washer and riddle putting gravel in riddle then power wash or there,s a product called Algon I use it on the local church paths3 pints to a gallon water on then leave a couple of weeks then wash with a power washer the gravel will come up well in the church yard its left for mother nature to wash it off Algon is available in 5 gallon drums direct from the manufacturer jezza
