Has anyone else worked with Phthalo blue? I gave it a go tonight. I found it had a very thick consistency the whole time, like a soft butter. I mulled it for a total of 2 hrs & I'm not completely convinced that it was finished. And holy hell, I knew it was a staining pigment, but I was not prepared! I now have some blue spots on the table (thankfully its just a plastic fold out table from bunnings)! Also I have throughly cleaned my glass slab but it still has traces on blue on it, any tips for cleaning it off?