get outta here Paul...really??? Are they water soluable? And to match tones (warm tones/cold tones), don't you have to build up the "color" by using different pens?

My spot tone cost me a few bucks about 10 years ago, and if I don't loose 'em, I'll have them the rest of my workin' days. The pens seem awfully expensive...
but you say they really work??