Why take the lettering off at all? Unless you intend to polish the inside of the top lid, which in extreme measures could be used as a signalling device, I have left my tin, as is, on the outside. Then again, I have para-cord and black electrical tape wrapped around the outside of my tin, so not much lettering is visible anyway! (I copied the look of Mr Ritters PSK and said "Hey, that looks effective, let's copy it".)