I agree with Jim.  There are no real "drop in" process replacements or
additions out there.  Never have been - never will be.

Immersion tin is one of the simplest to get on-line though, I can say that.
As far as a final finish goes, it is one of the easiest to install, use and
maintain.  The only real problem you'll likely come across is peeling mask
(which can be overcome in several ways) and possibly solderability issues
(which is even easier to monitor and avoid).

I would say that running an ENIG line is MUCH, MUCH more trouble than
immersion tin.  Harder to set up, harder to run and much harder to control
(speaking mainly about the nickel).

Mark Mazzoli

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