yup - I got the sets you see on the lawn - they were dirty and had turned cream - at this point i think that the material used to create them turns from a white to a cream over the years
I bleached some and then learned to dye them with dylon dye - polished the hubs on the black set
sold a load and only have a few sets left
as for how deep the colour of the dye goes ? it's less than a milimeter - as it only covers the mags and doesn't penatrate that deep - so brake rub will show after a white if the colour under it is different
how you dye them is a big part of it
cheers B