Unusual Etch on a Moro Blade

[spiral]

Nice barung Spunjer!

Ive had the same expierience etching kukri, my conclusian was hot water & air promote an oxidisation that highlight the otherwise low contrast laminations, due to some layers or lamination lines of the bladel oxidising more rapidly than the others.

As a technique I think of it as controled oxidisation highlighting.

Guess it needs a heavy oil soaking afterwards.

Spiral