Lycoming-8,

The clear coat is there on your vertical surfaces, but just has not been attacked by the sun as vigorously as the horizontal surfaces. The only true fix for the clear coat breakdown discussed in this thread, is stripping the old paint off the car and starting over from the metal. Anything else is just buying time. If one can truly and completely remove the clear coat without damaging the base coat, then the new paint can be applied on the old base coat with proper preparation. This is usually easier said than done, unless you can find the definitive breakoff of good clear and bad clear. If new paint is applied over the deteriorating clear, the new paint will eventually peel off.

Tom

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1993 300TE
1984 300D
1984 300SD
1976 BMW R90S