Brian,
I actually have grade 000 wool, not grade 00 as I first thought. I used that with WD 40 (similar to 3 in 1) instead of buying some 0000 grade and am quite happy with the result. I know I won’t remove the heavier rusted parts of the helmet with such a fine grade and I didn’t really spend more than about 45 minutes rubbing away however, as I’ve already said, I’m happy with the result.
Unfortunately my photographic skills aren’t what they used to be. One photo shows the difference between one half rubbed down and the other yet to be done and the others are show how it looks at the moment.
Aurora,
All though I’ve already gone over the helmet with a low grade wire wool I’d still be more than interested in hearing your suggestion.
Tony