Hi all. Sorry for the question that has probably been answered before but my search didn't come up with much.
I've been fixing my own surfboards for many years, but always have a problem blending epoxy repairs. Even with my best sanding effort, there is often a line between the new resin and the old. I've read about "faring" and "blending with a razor blade," but I have no idea what this actually means in practice. I seem to be able to blend patches just fine with PU repairs.
Any thoughts? Thanks.