Mostly light, whitish circular spots/lifting of the paint surface caused by water drying on the surface in combination with lime and salt. The inner areas are normally intact, while the outer edges are slightly lifted.
1. Insufficient drying of freshly applied coating
2. Excessive film builds are particularly sensitive
3. Wrong amount of hardener
How to avoid
Keep to recommended drying times, film builds and mixing ratios.
First wash with clean water. If this does not remove the problem, polish with Fine Polishing Compound and finish with any standard high-gloss polish. For major problems, sand down and apply a new finish.