There are some areas on my FB where there is some surface rust, e.g the rear driver-side wheel arch - on the outside horizontal sheet the paint has some cracks where rust infiltrated it. The sheet is solid and the rust is definitely not from inside. At first I thought about removing the paint on these spots, seal sheet and repaint it since I was afraid that this process continues destroying the sheet. Again I was told this: Since the system of the current respray is unknown and most probably not available anymore a spot repaint is most probably visible and may be not compatible. Furthermore, the rust hasn't been severe in this area. Recommendation - preserve current state by a suitable product. Does this make sense and - if so - what product do you use?