If he had his rockets in working order, he wouldn't have fallen into the water in the first place.

But let's not only point out the negatives of havoline's post. I believe that burn marks are on the agenda, and a complete rotoscope of every lightsaber and blaster bolt will take care of Vader's saber color loss, as completely insane as both of those challenges might be. But the insanity of going frame by frame and trying to add two-dimensional burn marks to a three-dimensional object filmed almost 30 years ago will be well worth it to add a bit of a shine to a nearly perfect movie.