[as400]

Bought this car recently and cleaning it today noticed liquid type marks as per pics.

Any suggestions on how to remove these unknown marks?

("Replace with RS5 grill" is beyond my wallets ability currently!)

 

[heylinTTnz]

Some cleaner wax

 

[smurkenstein]

Tough one. I'm of the opinion someone has sprayed tfr of some other sort of cleanser and left it and the plastic is stained.

You could try peanut butter - its an old trick for restoring plastic. Or try an interior plastic detailer (megs used to do them) bearing in mind it might go glossy. Or last resort back-to-black which is a plastic and rubber dye. That might cause a problem for you though as the plastic appears to be grey (and the dye is black).

Obviously try a small hidden area on any of these things first in case you don't like the result.

 

[smurkenstein]

Some cleaner wax

Yes, it could be a wax stain. Peanut butter might fix it.

 

[as400]

Thanks guys!...have never heard of this peanut butter trick!...crunchy or smooth?!

Will report back, hope the neighbours don't see me, might take some explaining!

 

[Eamonn]

WD40 might actually do the job too, though it doesn't last too long so you might have to reapply soonish. Most 'back to black' plastics products will help..

IMO it's not stained but actually discoloured from sun/rain or somesuch. Maybe a bit of heat from a hairdryer might work too?

 

[as400]

Autosol and finger grease sorted it, just enough grit to cut away the marks.