Hey guys, I have a question. My rear spoiler has some stuck on grime, maybe from the road. I tried removing it with soapy water, but could not get it off. What can I use to remove it without damaging the paint on the spoiler. My spoiler is the glossy black one. Can't figure out if the spoiler is plastic or fiberglass. I was told WD40 or alcohol? Afraid to use that. What are your thoughts.

 

The factory gloss black spoiler is plastic, either ABS or PP. It's painted gloss black from the factory.

Don't use WD40. You can try 50% Isopropyl Alcohol. If it's still stuck on use 3M adhesive remover. It's safe for paint.

 

I don't have any gloss black parts, but I use goof-off to remove the occasional bug poop (caterpillar nests high up in the tree above my car), tar stains, and road grime.

 

There's many products on the market that can remove this. I personally use Carpro brand. Try...

https://www.carpro-us.com/wheels-tri...1-liter-34-oz/

 

I clicked on the link and it said to avoid use on sensitive plastics and someone above mentioned that the spoiler is made of plastic. Not sure what "sensitive" plastic is but I don't want to screw up my new car. But it does look like a great product for car use.

 

PAPI - I assume you used very warm water with the soap to try and dissolve the grim? Another option that you could try (because I am not sure what you describe as grime (if you had a pic that could help)) is after the spoiler is washed (with warm water and soap) and dry, you could use some wax and rub gently and see if that would work. I have used wax on my mirror caps (black part) to remove very fine swirl and never had an issue with damaging that, so I assume using it on the spoiler would be OK too. Just be careful that you do not use an abrasive cloth, use the softest cloth and rub gently

 

Should be fine on the spoiler. People use it all the time around their entire vehicle.

Maybe provide some photos.

 

“sensative” plastic refers to glossy or clear acrylic. The spoiler is painted so no issues there.

 

I really don't know what it was to be honest. I did use rubbing alcohol and it dissolved whatever it was. I did try to use warm, soapy water at first but it would not budge.

 

^^ Well, as long as its gone, it's what matters. I am surprised the alcohol didn't do any dulling of the finish. Had you tried a bit of wax?