Things I liked:It is great in areas of spot rust as long as the spots are not too large. I have found that I can get the darker finish with multiple coats of the liquid; however, I am still trying different techniques. It does give an initial one-coat deeper finish. Obviously the paste makes more of a mess than the liquid. Things I would have changed:nothing, except it would be nice if it was less hazardous. What others should know:Should be already known, but cleaning and preparation is 90 percent of the work. Patience is the remaining.