Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "derekhawkins" <eldata@...> wrote:
>
> >I was thinking more of a post soldering protectant (overcoat)
> 
> Clear sprays (Krylon Clear etc.) were once popular during the thru 
> hole days when there were well defined component and solder sides to 
a 
> board. These days, most of us just prevent the copper from tarnishing 
> any which way we can but this is usually done before soldering 
(Liquid 
> tin, Tinit, solder paste etc.).
> 
> --- In Homebrew_PCBs@yahoogroups.com, "sethkoster" <sethkoster@> 
> wrote:
> >
>

I have always used Shellac to protect the newly etched PCB. Shellac is 
made by dissolving commercial Shellac flakes in methylated spirits. 
French polish is the same thing. Also I have a tin of product from the 
hardware store and it is known as "Patent Knotting."

The Shellac goes on the colour of varnish and prevents oxidation and 
can be soldered through. It appears to react like a flux when soldering 
through it.