I don't have experience with that, but from my understanding and what the Sellers' site says barring only inhibits color which causes the barring in mature birds. I don't believe it either enhances or dilutes color in chicks or mature birds.
Thats what I thought John.
The mom I'm using, is recessive white. She carries the barring gene since I got some black chicks with white dots and also solid black pullets. The mom appears to be E/eb or e+ and the sire who is a Rhode Island Red, which i believe they are eWh/eWh. Thats how Im getting Red color chicks. The Red chicks are either eb do to the coloring around the eye or e+ because Im getting chicks with stripes. I think those two are stronger than eWh.
In regards to the possible Red barred chicks, I did notice the headspot is a tad lighter and with some white down on them, compare to others that are darker. I guess, I have to wait and see if the lighter head spot Red chicks feather out barred. Once they feather out I should know.
I guess I have to see how they feather out to confirm.