The article outlines the process as follows,
Use an oversize length of streched sprue the same size as the raised line.Run the sprue through a puddle of super glue.The sprue should have a thin coating of it characterized by very tiny balls of glue.Be sure toget rid of any large globs of glue before attaching sprue,because they will mar the surface.Position the sprue over the area to be replaced,holding it taut at both ends,and then lay it down.Be sure to get the ends to overlap exactly where the raised panel lines end.Do not adjust it once it comes in contact with the plastic.If you position your eyes directly over the area to be replaced you will increase your chances of doing it right the first time.If you miss,let the glue dry,sand off the sprue, and start again.The glue will begin to dry immediately once you run the sprue through it,so you have to work quickly.Once it has dried,cut the ends of the sprue so they butt up against the end of the raised line and run some 600 grit sandpaper over the repaired area to blend.
That is pretty much the article as printed.Hope it helps you out.
Mkee