Larry Bud wrote:

There's a better way, however, than using the leading edge of the
blade. I learned this through fixing paint runs in automotive
painting:

Take a single edge blade, and some 1000 grid wet/dry sandpaper. Hole
the blade at a 30 degree or so angle to the paper, and swipe it across
a few times.

What happens is that a burr will develop on the edge on the opposite
side that is touching the paper. Now, take the blade, with the burr
against the paint run, and swipe down, in the OPPOSITE direction of the
sharp edge, so you're pulling towards you. What happens is that the
burr will shave a very slight amount of paint off with each swipe,
instead of cutting the run.

If the burr loses it's edge, just swipe it against the sandpaper a few
more times. Eventually you'll get the run to just disappear into the
background.

That's a good trick. I use wood scrapers on woodwork, and in paint
prep, but I've never tried the burred razor blade. Should work great
on paint runs. Thanks.

R