Saving Old Seagulls

Hi guys. what is the best paint to use on a seagull block? bit unsure if it needs to be heat resistant? secondly what colour would an EFNR block be ( I guess the big word 'silver' on it could be a clue )

Engine paint from Halfords etc or Frost.co.uk

I use regular black enamel or silver hammerite,never had a problem with these products as i find seagulls never get hot enough to need a heat proof paint.
the only fly in the ointment is that both products are not fuel proof but will resist the normal oil residue etc.

Thanks guys. Suspected they might not get hot enough to need heat resist, nice to have it confirmed so the first run doesn't undo all your hard work tho!!