Yep.
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Update...new pads with the supplied white 'grease' applied as per instructions: no effect, brakes squealed as badly as any I've ever heard. Shims installed: no effect. Chamfer leading and trailing edges of pads: no effect. Applied the CRC red goo yesterday: dramatic improvement, but still some squealing. I dread what they'll be like after the next encounter with bulldust or river crossings.
I've been through all this too Peter - inc the red goop (not sure mines CRC brand, but its red). Personally I have found the shims to be crucial. I also suspect that disc/pad brand combinations make a difference.
I remember pulling up to an RBT on the Tamboritha Road having just come off the dirt, and my rear brake squealing the loadest I'd ever heard them - I thought the cops were going to put my car off the road it was that bad. It can be very frustrating. Touch wood, at the moment both of my cars are squealing less than my neighbours Pajero - so at least they can't complain!
buff the rotors with a wire wheel, pushback springs and retainer clips can make a surprising difference.
Push back springs are made of very light wire.
IF you have the retainer clips and you dont clean up the pins they get stuck and the brakes develop a squeel.
Dont forget that the way you apply the goo counts espescially if you're using it with the shims. IF used properly the goo sticks the pad to the piston and caliper (if you have single piston floating calipers) IF you dont clean up the surfaces of both the pad and what applies the pressure to the pad the goo wont stick and then wont work.
Good luck.