On 25/02/2019 11:23, Tricky Dicky wrote:
I would be very wary of taking it down if badly corroded you may find yourself with a pile of bits. If it is still reasonably sound and not full of holes with pieces breaking off, I would paint it in situ, bitumen paint inside wire brushing treating the outside with a rust converting paint before applying a decent zinc based primer after which a decent undercoat and gloss to finish off. When Hammerite was still good I recall the smooth version was not recommended for exterior use, I don't know if that applies to the current version. Generally Hammerite in my opinion is not what it used to be.

Richard


Lateral idea - what about a good car underseal - maybe something like
the Waxoyl range? Some people swore by giving that a coat of Waxoyl
liquid once every few years to keep it soft.

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