I bought the Mini Needle Scaler from HF. This works great for removing undercoating. Keep it down at a shallow angle. It breaks off the thick coating in big chunks and pulverizes the thinner stuff.
I agree. It gets in the corners where other tools can't and makes fast work when removing undercoating. The undercoating will chip off best when it's cold. Also, after a lot of use the needles eventually lose the sharp edge. Use a cutting wheel to nip off 1mm from the end of each "needle" and it's good as new. It's one of the best tools I've ever found at HF.
