Hi Gordon
From the police station on Urb. La Marina, go down the dual-carriageway in front of it and take the 2nd right (90 degrees) into Calle Virgen de la Asunción. At the bottom go right (you have to) then immediately left into Calle Coto de Doñana. The ferretería is at the bottom on the left. The photo shows a yellow placemark.
This is Urbanisation OASIS, not La Marina, hence why I was confused!
Geoff.