Would moisture trapped under the plastic cause that? If so, there may be a chance it disappears as it dries out. Not sure how porous that material is.

What is the name of the quartz? And you need to contact the people who installed it.

Maybe try some denatured alcohol in an inconspicuous spot.

Definitely contact your GC, and counter installer and even Caesarstone.

Caesar stone FAQ

I wonder if this is what they used marble protection

I am a fabricator. Could be moisture as stated previously but probably not. Try acetone in a small area. I have used it to remove similar discoloring on quartz. It worked without damaging the quartz top. Full disclosure: it's not recommended for use on quartz by the OEM's and also note it's very flammable.

Personally, I don't think you should touch it with anything but Method Daily Granite or other recommended daily quartz cleaner until the GC sees it. You want him to see it in its original state (and not be blamed for anything).

Many GCs and even the installers don't understand how to remove stains from quartz and their solutions can do more harm than good. I would talk to someone at Caesarstone before proceeding.

No, not all quartz is that finicky. We’ve had quartz for years and it looks new, no stains, no chips, easy care. Visitors still comment about how lovely it looks.

I much prefer it to counters which can be etched by lemon juice and similar liquids. Some counters, those mad of granite and marble, etch easily. If regularly sealed, they can resist look better but why worry about it?

I love quartz. Cleaning with microfiber cloths results in a smooth, smudge-free surface.

I would contact the GC before trying any cleaners or other substances. If he is expected to replace it if the stains don't come off, he should be the one attempting the fix.

Some counters, those mad of granite and marble, etch easily. If regularly sealed, they can resist look better but why worry about it?

If you're going to make a definitive statement, please be sure you know what you're talking about because in this case, you don't.

Yes Marble will etch.

However, granite will NOT ETCH. Neither will quartzite.

I agree with oldryder, especially his safety warnings. If the acetone doesn't work, I'd give MEK a shot.

Agree with cpartist - I had granite in our old house for 10 years and it never etched or stained. The statement that it will etch easily is way to broad and misleading.

Hi. I am having a similar issue with my quartz for the same reason, when we removed the plastic , it left streaks in on the surface.

Can anything be done ?

Any marks on my quartz counter that have terrified me have come out with a light application of Barkeeper's Friend Soft Cleanser for Porcelain. Wet a cloth, put a little of the stuff on it, rub very lightly in circles on the mark (red wine, weird circular differences in reflectivity etc), then rinse with a lot of water, and it's perfect!

We have had our quartz since 2017 and with this trick it is still completely like new. Note that we do not set the Barkeeper's Friend bottle on the counter, and the cloth we use for Barkeeper's Friend is different from any other cloth in the kitchen, because prolonged undiluted contact with the stuff could damage your counter, so be careful, apply judiciously and hopefully you'll have the same success we've had.

Thank you!!

Tuesday Sligh We used acetone to remove the streaks. It worked great. I would do a small test in an inconspicuous place first.

Re: acetone on quartz, need to be careful as it can produce local changes in shine/reflectivity:

https://www.houzz.com/discussions/4670363/is-polishing-acetone-rub-marks-out-of-quartz-possible