I used pipe cement on a few pipes and they turned out very well. One was a super nice peterson bull dog I got for cheap. Now its one of my favorites. There an article in on forum somewhere on how to make it.
I've never tried this on a pipe, but have on other things...to match the color better, while the fill compound, of your choice, is still fresh lightly sand a large area around the fill with 0000 steel wool, or a high grain sand paper, the finish dust will stick in the compound & color it. Careful not to sand too hard so you don't discolor the area.