I have sharpened a few which have a clip design but have not had the clip sharpened. The Ratmandu is a good example.
I am sure sharpening them would not constitute a "breach of warranty" ... Jerry has never failed to replace a broken Busse ... from guys who thinned down their edges and were caught out by frozen wood ... to guys who hammered their blades into paving then kicked them ... he has posted on this many times ... so if you're using the knife as knives are mean't to be used I doubt you would have a problem warranty wise.
If you do decide to sharpen a clip or create one ... just keep the knife cool by immersing it in water after a few passes on the belt sander ... people worry about unwanted heat- treatment alterations from belt sanding/sharpening but if you google heat treatment information on any common steel and look at the temperatures involved ... the blade would need to be hot enough to light a cigar from it ( i.e. "red hot" ) to have any "altering effect".
I put a sharpened clip on my Bushwacker Mistress ... the knife had been a CG finish which was stripped and given a ghetto satin clean up ...
I learned how to do this by reading a few of Horn Dogs threads and e-mailing him for a few more detailed tips ... after that I just practised ...
You can still baton fine with a sharpened clip ... again many think it creates a problem where it does'nt ...
All you get are a few marks on the baton and if it breaks pick up another ...
The clip point works well on a number of tasks where you would'nt want to damage the main edge ... I use mine a lot for fire steels ... helps throw a good shower of sparks to get a fire going ...
Doing a clip carefully has no harmful effects on the blade ... as soon as I did the "clip" I took the knife out and chopped down a dead tree on my land ...
The large limb burning above came off the tree ... and was chopped down using the BWM ... not bad for a 3/16 thick "lighter" Busse ... :thumbup: