fading brakes

[Popeye31]

I have been noticing the brakes on my 29 CCpu are fading when I use them at 30mph and above pumping the brakes will slow the fade down but the other day they faded to nothing and I need to fix it. pulled the hubs and all the shoes look good and I started to adjust the brake rods to make sure all the slack is out but need to let a few of the pins soke because they are rusted on the rods so I will work on it tomorrow. but my question is what have you done to eliminate brake fade. I have the stamped drums. does any one know what the thikness of the drums suppose to be so I can see if I need to change to a fresh set of drums. any advice or comments are welcome.