Looking great. I think you were wise to tape up the binding. A shame about the scrape but there's a very large chance you'd have added more than one scratch if scraping the binding. Plus, scraping the binding when it's covered in black paint (or any opaque colour), is very difficult and it's very easy to overdo it and scrape paint off the body (which means more touching up).

When the paint's dry, I'd suggest wetting the touched up area with turps or white spirit. If the colours blend together when wet so you can't see a difference, you should be fine once the clear coats go on.