Look for where the sand came from
The extra sand had to have come from some place, so why not look for the area where it came from.
Sometimes a sanded in lower beach can be a water hunters best friend, if you know how to water hunt.
When the lower beach is sanded in, I search for areas inside the water close to shore that look like they have lost sand, rocks showing is an obvious sign.
The same applies to a steep sloping beach, the wet sand at the bottom of the slope close to the water may be the place to search.
I have seen water hunters post on detecting forums that shallow water hunting is bad because it is sanded in, pity they do not search the lower beach too!
Beach and water hunting is often a game of inches, changing to a larger search coil can and often does make a difference during sanded in conditions.
For example, my Minelab CTX 3030 17 inch search coil is a good six inches deeper than my 11 inch search coil, on a wide variety of commonly detected objects at the beach.
When you know a beach is sanded in, forget about target separation and go for deeply buried targets.
A sanded in lower beach may have few good shallow targets, but it may hold many more good targets a little deeper and further away from the water.
Look for coin lines
Just because a beach is sanded in, it does not mean you cannot find anything.
Stuff still washes up on the most sanded in beaches, especially flat objects like coins.
Rely on your twin optical scanners to look for shells or seaweed from previous high tide lines.
An east - west search pattern on a north - south running coastline, should help you to pick up on any coin lines at the beach.
Once you see a line or loose pattern emerge from your dug holes, switch to a north - south search pattern and slowly search along that line.
If you are lucky, you may pick up on a deeper coin line that is not visible on the surface, objects probably deposited on a previous high tide line.
Just because a beach may look pants at first sight, does not mean you should walk off the beach and go home.
Some of my favorite finds have come off sanded in beaches, from Spanish treasure coins and artifacts to modern bling, I assume because local hunters thought the sanded in conditions were a waste of metal detecting time.
I remember this diamond ring washed up on a sanded in beach, only a couple of inches deep and placed in my finds pouch because I bothered to search the sanded in beach.