Repairing a damaged DVD-R

I recently managed to damage a DVD-R accidentally when the underside of it was scored by something metallic as I was clumsily handling it.

Now it cannot be read on my computer.

Basically there is a long score mark that runs across the DVD nearly the entire diameter. I'm not sure how deep it is, but it doesn't appear to have gone to the media layer, I would hope.

I'm wondering what way there is to render it readable again. Is there a do-it-yourself method or some device/product? And if it is a product, what is the best reasonably price off-the-shelf one that can do the job?

Jam it back in, in the dark.