Scraping sound when accelerating

[MrChris]

Looking for suggestions... getting a scraping metallic sound when accelerating from lowish speeds on the nearside wheel. Using my Google-fu this suggested that the plate around the back of the disc could be catching the disc itself or there could be a stone.

I've pushed back the plate as far as I can and I've checked for stones - doesn't appear to be anything there. Car seems fine otherwise. Any other suggestions? Currently sat on the drive with the wheel off.

EDIT: It's on the rear nearside.

[shnazzle]

I love a challenge but unfortunately I'm drawing with and  inkless pen here.

Does it happen from standstill?
It might actually be the very shrill sound of cat heat shield rattle.

[MrChris]

Not from stand still, just seems to happen at low levels of acceleration. I was starting to think it was when the car is vibrating at a certain frequency...? I did a test run after moving the plate around the disc and it seemed to improve then came back. Just before the light faded I took a pair of pliers to this plate and really bent it back so depending on if I take the bike or the car I can test it tomorrow. It is an odd one though...

[mr2garageswindon]

Pad wear indicator scraping on the disc?

[Ozzy]

Are you sure the arch liner or undertray hasn't come loose?

Happened to mine and thought it was brakes or something aswell as it made a weird noise.

[MrChris]

Okay so I've tested it this evening having pulled back the plate again from behind the disc and it seems to have done the trick... what I find strange is that this has never happened before and I've not been messing with it. I was under the impression this part shouldn't move. I'll be monitoring it to see if it comes back in case it is something else.

The liner/undertray all seems good. The undertray can't budge at the moment as I zip tied it up good last time I was properly under the car. The original sound was very metallic though so doubt the undertray would have caused that?