I "think" the ice blue is in b'tween the white and biege
I think your "safest" but still effective at scrubbing would be a green striped scrub bonnet.
More effective than shampoo brush and when saturated with pre-spray, little to no concern of messing a carpet like you can with agressive VCT pads.
green is scarry to some guys and SHOULD be used with caution and/or experienced roto scrubbers.
I shouldn't tell you I went from stripping a VCT floor, then hoped over the carpet strip right on to the trashed/salvage berber....with a BLACK pad :wink:
I thing I might of even used wax stripper as the pre-spray
it was a "highend" sec 8 in a "highend" gAhetto projects :mrgreen:
..L.T.A.