er, isnt there an instruction in wacros about holding shift, or ctl or something to apply the wacro to all materials ?

darn , now ya made me look it up !

it says  shift_click to apply action to all materials

If that doesnt work for you post again . the code is fairly simple.

fig = scene.CurrentFigure()

mats = fig.materials()

for mat in mats :
    # whatever yer doin goes here

end script

the exact syntax wont be right , but you can look it up in the python methods pdf :)

i