I use the rosin flux pen. Seems to work pretty good. After a year or so the board will turn a bit brown, but no corrosion, and you can still easily solder on it if you need to.
Where do you get your can of alcohol thinned rosin? Do you have a link?
--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan <stefan_trethan@...> wrote:
>
> If that is your only goal you could also paint it with a solution of
> rosin flux and alcohol.
> I bought a large spray can of that stuff and it will do many boards,
> but you can also brush paint or dip.
>
> The flux dries to a clear hard coating.
>
> ST
>
> On Sat, May 22, 2010 at 6:47 AM, Kerry Wentworth
> <kwentworth@...> wrote:
> > Prevents oxidation of the copper, and flows solder well.
> >
> > Kerry
> >
>