I never saw the need to electroless tin plate pcb's. It's an added step with
messier chemicals. Most boards won't tarnish like a copper penny. I have
boards in working equipment for over 15 years and they still look as shiny
as the day I made them. Sometimes tin will build up an oxidation that will
cause solder to bead up and not flow properly. Obviously exposing the board
to harsh environments or continuous handling will cause the copper to
tarnish to some degree.
Rick

Jesse Lackey wrote:

> Hello all,
>
> I've been making my first few pcbs, using an iron-on method (laserprint
> to special paper) and they're looking sharp.
>
> But cutting them is a royal pain.  I use a hacksaw and its basically
>

<snip>

> Also I need to cover the copper with something after its assembled to
> prevent oxidation.  Tinning is mentioned ... seems like a messy and
> expensive pain.  What about a "flux pen" or "flux rework"?  Could I just
> spray clear acrylic sealer stuff over it?  A couple coats would seal
> well, I'd think.  Anyone try that?

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