Leather touch up pen did mine in my old car. Not quite as bad but it covered it a treat.

 

I used this stuff on my old ST500 seats when they went the same & it worked a treat.

Amazon.co.uk

 

Cheers will order that now, did you also need the All In One Leather Colourant it mentions in the description?

 

Mine has done this too. Have ordered the filler now.

(I found the same company selling on eBay at same price if you don’t like Amazon)

 

It was a while ago but I think I did yes as it helped seal it all in.

 

Thanks did mine today was a bit worried that the filler wasn’t a good colour match but it looks 10 x times better now that I have used the colour restorer.

 

That does look loads better

 

Put a second coat on and third if needed. It will be very hard to spot then.