Yep Hoooooter I have heard other people say that.
As I am a hobbyist and this is all new to me, experimenting and showing what I have come up with I can only speak of that experience.
I have not tired the anodizing dye yet.
The cloths dye can be tempormental if not kept heated to certain temperature I have found. I don't know how the dye made for this purpose reacts. The cloths dye I found at 140 degrees F will take consistantly and also the dye itself wants to breakup and dissolve evenly everytime I heat it to that temp. I store it, after it cools down, back in the plastic jugs the water came in. When I get it back out to use it is like all clumped together. When poured back in the pan it has to be heated back to 120 to 140 and stirred and it will mix back into or dissolve back into one nice solution ready to be used.
As far as the dye taking to the part I guess it is like any dye the longer it is in the solution the more takes to the part or it gets darker.
I have had no problems with it unevenly taking unless part was not preped right.
Also I found the dye not taking correctly one time because the parts actually got to warm in the anodizing tank.
It appeared as the crystallin layer was building in the anodizing tank and it was sealing itself due to heat.
I had to many parts in tank and the anodizing solution heated up.
I will have to give the anodizing dye a try.
The dye I use now and have only tried is the RIT cloths dye liquid solution in the 8oz bottle.
Thanks
Have a great day!
Ed