Lightening a too dark veg tan panel.

[toxo]

Is there an accepted method of lightening it? I wouldn't bother but it's a large bag panel that's almost finished Inc stitching holes. I dyed it too dark a long time ago and it taunts me each time a see it.

[DieselTech]

I think it all looks pretty good to me. Maybe I'm not picky enough? 

I bet wiping it down with acetone would lighten it. Don't know if this is a proven method thou.