Is this rust? The photo is of the plastic rear bumper but there are other similar spots all over the car, when touched it feels rough and is raised from the body work. I have tried autosmart tardis, but no joy. Any ideas anybody?

http://img.photobucket.com/albums/v224/t2ype/rust.jpg

Used an angle grinder near your car?

Its tiny metal filings/sparks fused into the top layer of paint.

My last (brand new) car had them, and its quite common it seems

Got rid of most of them over time as they literally corroded away. Not sure if claying will help (others are more knowledgeable in that regard) but polishing will reduce the effect, and a wax/sealant will stop the cleaned spots oxidising.

Metal filings of some sort going by your description and photo. Try some meguirs\poorboys agressive clay with plenty of lube. See how that turns out :thumb:

saw something similar to this on the rear bumper of our forester (plastic) it turned out to be from rusty water dripping from under the spoiler where the bolts were. scraped it off with finger nails.

scott

can also come from knackerd brake pads ;)

Thanks for all the replies, I tried the meguirs clay and after about 2 mins on one spot it shifted, would i be better off buying a more agressive clay or just using my finger nails (which also worked) I want to inflict as little damage as possible.

stick with the clay, there is a larger risk of damaging paintwork by scraping with nails

Used an angle grinder near your car?

Used to have a white Prelude.. was in A1 condition with superb body work.. some plank in work was chopping the roof about of our factoy and showered my car with metal filings.. Was NOt impressed.. took ages to clear them all off, can't remember how but had to wax it a few times after that!

Two safe solutions; either an aggressive clay bar with plenty of lube, or a chemical fall out remover. Both will remove bonded metal filings that are corroding in situ. :thumb: