I have radiators which were painted previously, I have scrubbed them lightly with steel wool.
Do I need to apply a Metal Primer on it ?
I have Dulux Once Gloss which I intend to use over the radiators . This paint doesn't require the use of undercoat ( as mentioned on the can).
As long as surface is sound and previously painted. Try thinning the gloss a little, apply heavy but even, and keep edge wet, keep laying off quickly as you go. when you finish the rad wait a few minutes then check for any runs, if you see any, dry out your brush onto newspaper, then lightly stipple out each run.
Done it like this for yrs with just a light abrade to dull the old gloss then a clean off usually only one coat.
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