I also play courses with these 'hard pan" bunkers which after being watered down, are sun baked. I use my lob wedge, and choke down on the club as needed for distance. I use a normal chipping stroke with no wrist action, while keeping my hands even with the club head. This type of stroke (for me) lets me use all of the club's loft. I was taught this shot by a guy who learned it by hitting balls off a piece of wood. GJS