Isn't a myth. This stuff WORKS!!! I would show pics, but I'm not done yet with the project so you guys are going to have to wait. Suffice to say that this stuff takes bluing off in less than 45 minutes with very little scrubbing afterwards! And, the coolest part is that you can do this in an enclosed space without fear of chemical contamiation or fumes (Unless you mix flavours and get an odd combo). If you mix it in a medium paste and use a foam paintbrush to apply it, you'll get a smooth, even treatment. But be warned: This stuff is STICKY! But water takes it right off...and it stains in it's thick paste form if you get it on any cloth.