I'd bet that the cleaning removed the spray adhesive from the surface and left you with the spray texture on the part. What spray tack did you use and are you sure you didn't use too much of it? Some (most) of them don't completely dissolve in epoxy and leave traces on the surface. I like to use the isotacker from sicomin against the mould of visible parts, and then aerofix 2 for consecutive layers, as the tack is much better.

never tried that one, we are using the fibertack and applying a very thin coat just to hold the material in place. And then using es99 to hold the rest in place.