Hi All

I was under the car the other day and noticed a shinny bit on the left upper control arm and when I turn full lock to the left i get a rubbing noise. I don't understand how this can happen because as far as I know the control arms are not adjustable in any way. The arms + bushes were replaced around 8 months ago and the car drives fine at all other times, before the arms were replaced I'm sure I had the same wheels on and there was no rubbing. The right side is fine and on full lock to the right there is no rubbing. Any ideas? Is this a sign of cheap arms / bushes?