I didn't think I would write a review but here goes. As some know I have tried the Top Flight panel pen. It works real good (until you put clear on it) I shot the clear on my Satona today and the my surprise the ink smeared. Man I thought I had found the answer but do not use this product if your going to spray Urethane paint over it. I have another plane I used this product on and You can not wipe it off the same way you can the technical pens.
So my best advice is don't use it unless your real familiar with the finish process. It has cost me a couple of points on the finish. Never again!