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


Smooth hammerite has always been a bit flakey - though I once had good
results baking a small piece in an oven.

The hammered finish seemed to stand up to anything, but some say it was
prone to pinholing.

I agree with the above - a good quality zinc primer will go a long way
to a good finish.

sorry - can't advise on modern metal paints - so much has changed and
strangely I've not had the need to paint exterior metal for a long while.

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