Hi John,

what's your etchant ?

I use clay paper with FeCl (because I still have some) and haven't
noticed bubbling. I also float the board upside-down. Before etching
I go over the board carefully and remove any unwanted clay. To get
in the component holes and general fine scraping (after the odd touch-
up with a Sharpie) I have a needle epoxied into a pen barrel. Then
it gets a gentle wash with soap and water and brushed with the edge
of a toothbrush. All that remains should be toner and copper. After
etching the bulk of the toner is removed with sandpaper and then
wiped with white spirits / turps

Joe


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