Drying time for touch up paint before using Langka is 2-24 hours. The variation in drying
time is due to varied climates. Hot and dry will dry faster than cold
and wet. For non-metallic paints some people let it dry for days (so
apparently you are OK if you don't do it tonight). Langka may even
work on very old touch up paint. Just takes more rubbing.
Paint may "shrink" in the touch up area, if it does, apply more coats.
Keep applying paint until you get a blob to eliminate.
Only use the touch up "clear coat" if you think the touch up paint
looks dull compared to the car paint. Same process.
Some people mix their touch up paint and their clear coat in 1:1 ratio
instead of using the touch up paint alone.
Sealant: Same process.
You can wax the car (Zaino) 24 hours after completing the paint