Hi together I’m just about to paint my cabrio. As far as everything went well. Now I notice that when it stands in the sun or heat gets off the paint again. Vehicle has been painted for 2 weeks now. If it’s cold everything is good it gets warmer, so it’s in the sun you can leave fingerprints in the paint. Mixing ratio of clear varnish and hardener is 2 to 1. Have now applied to the sample some of the base varnish on a sheet and that now already since a It is not dry it adheres properly to the finger. Can it lie on the base varnish that I leave fingerprints on the painted parts behind? I have to say unfortunately the vehicle is Bj 1990 and the base varnish is original from the vehicle manufacturer so believe also about 25 years old. Is that it? If yes, it can cure out. But still?