Being that bay side blue is a three layer colour its quite tricky to do edge to edge matches. I'd recommend that you let the panel shop do it there way. Unless you bought the car brand new, you can't be %100 is all original factory paint either. When it comes to paint, what 'mum doesn't know won't hurt her'. I'm sure I saw you at the show on sunday, she looked bloody neat mate. Any way, if it was mine, I'd let them blend where necessary. Let us know how ya go, n put some pics up