Dull Patch on UPVC Window Sill

Hello,

I had new UPVC windows installed about 3 months ago. I have given them there first major clean today and have noticed that there is a distinct dull patch on one of the windowsills. I dont know if something has been stood on there during install, but this is the first time they have been touched since fitting. The installer gave me a tub of Siroflex SX Cream Cleaner to remove any marks from the frames should they arise. The tub says it is a mild abrasive. Reading on the internet, there are a number of mixed reviews about using abrasives on UPVC. Does anyone have any experience of using this cleaner or others for such purposes? The dull patch can only be seen very close up to the window and it cannot be felt by hand. Will this cause any more damage?

Thanks,

When the internet says avoid abrasives it means more like Jif. PVC cream cleaner is a mild abrasive and is made for the job and is fine although it probably still won't 'polish out' this dull spot, try it and see. You may end up needing T-Cut and then car polish

Thanks for the reply. Would it be best to go over it with a solvent cleaner first and then the cream cleaner to buff it up afterwards? Cheers

Solvent is only really for fingerprints and pencil marks just general dirt from fitting, cream is for the same but more stubborn marks. I'm pretty sure your windows are white but just in case do not use solvent if your windows are woodgrain effect or have any coloured foil on them

crank39 said:

Solvent is only really for fingerprints and pencil marks just general dirt from fitting, cream is for the same but more stubborn marks. I'm pretty sure your windows are white but just in case do not use solvent if your windows are woodgrain effect or have any coloured foil on them

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Hi, Thanks Yes, they are white windows. I have heard about the effects of solvent on coloured foils so will keep well away from the front door!!!