On Oct 1, 7:32 am, martin wrote:
I recently had some dark blue Marley tiles laid in my kitchen (the
label on the box the contractor left said they were 'semi-flexible').

Today I noticed a few thin white lines on them. The only thing I'd
ever dragged over the floor was a polythene mop-bucket, which I
thought was far too soft to scratch them, so I thought these lines
must be something I could clean off.

So I tried to remove the lines with a mop and Flash liquid, and when
this didn't work, I rubbed them with the sort of plastic scouring
sponge you use for non-stick pans. I thought that since it was
plastic
on plastic, it couldn't do any harm.

Now the floor has lots of large pale patches that I can only assume
must be thousands of tiny scratches made by this scouring sponge.

You can use the scrubber pads to polish metal, so it's not a stretch
to think it could affect vinyl tile. They make a bunch of different
types/colors of scrubber pads. Check the 3M web site for Scotchbrite
pads and pick the least abrasive one.

R

R