Save at least one old spindle pin! Cut the threaded ends off and use it to BASH out future spindle pins. And I agree with johnc's first point! I have NEVER reused one!
Do you think a spindle pin made a few thou undersize would be a problem? A size ever so slightly smaller to allow easy extraction.....????
Oh ya...for a bit more than twice the price of 2 NISSAN pins ..$40....you can buy a cheap hydraulic press...and use it for other stuff like bearings.