I've had ghosting on Kona. I didn't like it.
Just out or curiosity- what were the dates on both conversations? Has Frixion put out any new pens since the original question? I think I've seen references to new fine points.
(I've had better luck with the red and blue markers rather than the black)
There's also a pretty good thread on this forum about Crayola Ultra Washable markers. What does the mfg say about those?
Made for cloth or not, some pens, like the blue washout marker, will leave brown stains behind. If the purple doesn't air erase, you can wash it out. The problem with both of these markers is they dry out too fast.