Low speed brake squeak

["O'Farrell, Fergus" <Fergus.OFarrell@ngc.com>]

I encoutnered the same thing, and I was told the pads were chattering
agains the pistons, until they got warm.
I slipped them out and added a thin layer of white lube, between pad
steel backing and piston face.  worked fine for about 6 months.  Yep, it
always squeaked at low speed, so they squeaked for my neighbors early in
the morning, and at every car show I attended. (!!!)  Didn't have any
problem removing them for re-application.
Fergus O, 69 2000, HB, CA