1. is there something I can do to keep to keep the origional metalic look of the khukri blade to avoid it getting a patina? Like if I want to display it?
2. Can I chop down trees with a 15" Sirupati?
If you use the kukri you will scratch the finish no matter what you do. The only way to restore it to pristine is with a buffing wheel and white buffing compound.
If you want to keep the blade from ever getting a patina you can periodically use Flitz or Simichrome to polish any patina back off the blade.
I had a brand new Marble's Woodcraft and an ndn friend of mine wanted to dismember the wings from a wild turkey.
The first cut turned the steel a very dark charcoal color and Flitz took it right off with very little effort when we were done.
You can put a nice satin finish on the blade with sandpaper or a Maroon Scotch-Brite pad. Just be careful along the edge because if you rub along the edge proper it will definitely dull the blade. I generally rub the blade lengthwise right close to the edge and if the edge needs cleaned up I'll rub from the direction of the spine to the edge being careful to not drag the Scotch-Brite around the edge proper so as to not dull it.
IMO the satin blade looks better than the polished blade and very few of my kukris have the polished blade anymore.
But I do have a dedicated buffer along with the one on the shaft of my Grizzly Knife Grinder. I dress it with tripoli or jeweler's rouge to get the heavy scratches out and then use the other two buffing wheels on the other motor for the white and green compounds.
A 15" Sirupati is not a real chopper but the 20"+ Sirupati can do an excellent job of chopping as can the 22"+ Chitlangi.
My large Chitlangi is duel fullered and it's fairly light but it cuts like a much heavier kukri as does my 18" BGRS.:thumbup:
I don't like that polish myself due to the duck guano he adds to it---works great but the stink is terrible. I also have the urge to find a one legged woman and crawl into the earth.