Tim JF Cuss UK asks about the use of oxylic acid in the treatment of veroa. From my photographic background, I can share that oxylic acid dissolves the bones of the living human operator, over time of course, and when used without a proper fume hood or other protection. This is another solution that sounds like nasty desperation. Other's mileage may vary - just my nickel's worth of knowledge. Robert MacKimmie