You maybe SOL on this one. The only thing I can think of is to add 40% citric acid to the sensitizer before coating. Add 1 to 2 drops for every 2 ml of solution. You may also wish to couple this with development in a 2% solution of citric acid.
Originally Posted by TheFlyingCamera
You can also develop in a 1:5 dilution of white vinegar. Dump the solution after every print to avoid highlight staining. This will probably increase your exposure time. Also consider coating with 2 parts A to 1 part B.
You didn't mention what paper you are using.Different papers have different scales.
My 2 cents,