some of you all may remember that a while back i tried claybaring my car which didnt work out too well (started to clay bar and actually got scratches in the paint from it). now being that it has been about 6+ months i still have the remaining portion of the bar (which was broken off of the piece that i used before hand) is this bar still good or is it recommended that i go out and get a new one? its still in its packaging and in the box away from heat and sunlight