I can't recommend fogged papers for pinhole or maybe my test was just too over exposed with added reciprocity compensation.
I just made an 8x10 pinhole camera and tested it with an old foggy Agfa Brovira (this is for my lith printing). 2 sheets were fogged/overexposed. 1 is almost black and the other one has some details but really foggy grays.. It might be the added over exposure as well. I will test more sheets on my 8x10 pinhole using the fogged papers before i paint it. I will keep you updated on my experiments.
By the way, just to make sure i could create a good paper negative i will be buying some papers from Adorama. You should check that as well.