Re: AVT - Avo Two Panel Valve Tester?
You also have to manually remove all the old infill and clean out well before using chinagraph to refill. Peter's advice is good regarding use and overspill removal. I did exactly that process with some old chicken head bulgin knobs pretty recently.
Regarding Tippex. I used it a very long time ago to fill in the lettering on an AVO8 mk 3. But that was back in the days that Tippex used a volatile solvent, which has since been banned. Tippex is now solvent free, and I have no idea about its suitability for filling lettering.
Craig
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