Beginner Gardening: Acer Orangeola White/Yellow patches on leaves - Any ideas?, 1 by Davelad

Davelad wrote:
Hi,

I bought an Acer Orangeola tree online and when it arrived, it was covered in this white-ish yellow stuff that appears to have been eating the leaves, or at least that's how it looks to my untrained eye.

I was wondering if any of you experts could cast an eye over this and see if you can identify the problem and if it's easily fixable, or should I be sending it back?

I also bought an Acer suminagashi and that also has a similar problem, albeit nowhere near as bad.

Thanks,

Dave.