Now I have to think of a dumb question to ask - Ah, got one!

Like will anyone who has experience of lemon juice as a stop bath please tell me how they got on? - I would like to be the lemon-aide on this one, but don't have a pH meter, which would make life easy

I grow citrus trees between the veg' garden and the septic system, so I have a lot of lemons, including one at the local auto repair yard