Morning
Got a reply from dulux about my theory;
Dear Mr Hughes, many thanks for your enquiry.
In responce to your question, please be advised of the following. If the
radiator is previously painted and after care preparation, I would only use
two full coats of gloss for the re-decoration process. I would only use an
undercoat if the radiator is being painted from new or you are going from a
strong colour change i.e. black to white!
I hope that this settles your discussion?
For further information on our products and services please log onto
www.duluxtrade.co.uk
With Thanks,
Jamie
ICI Customer Services
Have to confess that I've used q/d eggshell with duet / sonata effects on rads and still ok after several yrs.
Or aquatec x 2cts of gloss.
But today I gave one coat of gloss to two rads on top of factory finish. They were several yrs old and looking tired lol.