Back in '73 or '74 I worked for Jock Sturges for a short time. He showed me a printing technique that he called 'chemical dodging'. I used it occasionally, but I've never come across anyone else who has even heard of it, never mind used it.
Here, briefly, is the basic process:
Soak the unexposed paper (FB is OK, RC doesn't work so well) in water.
Squeegee the paper down on the easel (helpful if it's a vacuum easel - I got one just for this).
Make the first exposure.
Sponge developer over the print and let some development occur before squeegeeing it off lightly.
Make subsequent exposures until you have the image you require.
Stop, fix and wash as usual.
There's lots of potential for variation. Has anyone else come across this?