Thanks Nick,
We are now of course, waiting a Sikorsky official answer and plan of action before winding our rotors up again.
Having look closer one of the marks with a magnifier,it doesn't seem to be too deep and very tiny blisters around the hole can be seen (not on all of them), but there is also what looks like a superficial burning trail oriented in what could be near the relative wind direction (about 45° from chord towards the blade tip.)
Really curious to know the answer ...hope it will come quick...Fed up walking on parkings,still addicted probably.