White patch on cattleya roots among other things.

[Deeplydeepali]

I've finally found time to repot my first cattleya and I've discovered many things. The strangest thing I found was a white patch on it's older roots. It doesn't seem fuzzy, but paint-like. Is this normal? I think I may also have had a teeny snail as the roots seemed to have been chomped on and I think I may have found it itself. I sprayed it with hydrogen as adviced on some youtube tutorials. Do snails cause new roots to brown?