• I would do as Chris advises but a good tip is to gaffer tape a 'Scotchbrite' pad to a piece of dowell or cane, soak it with WD40 or GT85 and run it up and down the seat tube. Use a small (brass) wire brush to clean out the BB area running it 'round' the threads. RInse everything very well with more solvent. I always clean out the top of seat tubes especially like this and finish off with 180 then 600 grade or so wet and dry to get rid of any burrs (that would knacker a nice Campag post...)

    If you want to preserve a frame you need to use Waxoyl or similar but thinned 30% or more with white spirit, heat it in a bucket of boiling water and pour into a warm frame (with all but the seat tube taped up) - twirl it round every which way and let the excess drain.

    One very well preserved frame.

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