I stained blades with warangan many, many times. I tried also with others substances but the result was always bad

. By warangam with new blades the result has been always good

........with old blades

sometimes good.... sometimes accettable...sometimes no good

If a person finds an easy way to stain the blades he must win chemic's Nobel

Tomorrow I must stain an old blade ....first time (a week ago) the result was no accettable. Now I have done a new liquid (brasilian limes and warangan) i hope to have a different exit (IMO the more difficult passage is the final : when I must clean the blade with water)