How to undo this ceiling light cover?

WIAWSNB

It has a serrated edge, so it looks as tho' its meant to be grabbed and unscrewed, but it's also thin so hard to grasp. And I suspect it's been painted shut too.

Just looking for confirmation that I do need to unscrew that chrome trim?
Ta.

On-the-coast

Mine are just “friction fit”. I lever them out gently when I need access 

kimwp

On-the-coast said:

Mine are just “friction fit”. I lever them out gently when I need access 

Same for mine. They have little sprung metal strips poking up that hold them in place.

If you are trying to get the bulb out, you need to unscrew it* by (gently) pressing on the flat surface to gain purchase to rotate it. Then lefty loosy. Good idea not to screw them in too tight otherwise it makes it hard to get them out.

Edit, by "it", I mean the bulb

FrugaiMacDugal

A suction cup might make unscrewing easier,

WIAWSNB

Thanks, all.
That's what I was looking for - I don't wish to remove the whole fitting from the ceiling by prising it away, as these spring clips often do damage to the p'board edges, so Kimwp's confirmation will hopefully be the case.
I suspect the ceiling has been painted to the chrome edge, so will try a screwdriver blade on the serration (around the back where mil won't see...) and a few taps to try and loosen it.
Cheers.

Greatgimp

Try sticking some masking tape to it and twist off using the ends to grip.

WIAWSNB

Now that I know the chrome cover should unscrew, I can try a bit harder! 

It's so thin, tho', that only yer wee finger tips get on it. I'll be bringing my 'ammer next visit, and make sure mil is not present...

grumpy_codger

FrugaiMacDugal said:

A suction cup might make unscrewing easier,

Suction cups are for extracting light bulbs.

WIAWSNB said:

Now that I know the chrome cover should unscrew, I can try a bit harder! 

It's so thin, tho', that only yer wee finger tips get on it. I'll be bringing my 'ammer next visit, and make sure mil is not present...

Try a bar clamp if you have it.

stuart45

Has the MIL got a jar opener?
If not a pair of Stilsons.

flaneurs_lobster

Not obvious what you are intending - 

Are you trying to replace the bulb or trying to remove the light fitting?

WIAWSNB

No idea what a 'bar clamp' is? (Edit - ah, nice tool, and could indeed do the job.)

I'm trying to remove the chrome cover only, in order to then replace the bulb - it cannot be removed directly, as it's bigger than the hole in the cover. (I can see the actual bulb behind is held by the usual spring circlip.)

Diameter is too big for any tool I have - I'm guessing it's around 125mm?

I'll try gentle anti-clock taps with a flat-blade on the serrations. 

Cheers.