Product information "Picobello AQUA Brush Pen Clear Lacquer"
The new water-based solution: For a selective sealing and gloss sheen adjustment of repaired areas as well as for removing fine scratches and abrasions on lacquered furniture surfaces and on wood and laminate floors. Available in two gloss sheens. The lacquer inside the pen is very durable, lightfast, and weather resistant.
To be used on:   On surface and/or materials:
Abrasion   Wood flooring, lacquered
Light scratches   Laminate flooring
   Laminate surfaces
   Wood surfaces, lacquered

It's that easy...
1) Shake pen for about 15 seconds. The rattling of the mixing balls must be clearly audible. Before using the pen for the first time, rinse out brush tip under running water and dry it with the cotton cloth. 2) Take off cap. Before each use, hold pen with tip pointing upwards in a cloth and squeeze area marked “P/PRESS”. The pen is de-aerated. 3) Hold pen with tip pointing downwards over the cotton cloth and again squeeze area marked “P/PRESS”. Lacquer flows into the brush tip. Slightly dab brush tip on the cloth to avoid a sealing that is too wet. 4) Apply the lacquer evenly in one direction to the repaired area. If possible, do not apply lacquer to the surroundings. If lacquer flow decreases, again squeeze area marked “P/PRESS” and slightly dab brush tip on the cotton cloth. After use, wash out brush tip with water and dab dry on a cloth. Firmly put cap back on to prevent brush tip from drying up. Note: Water-based product - must be protected from frost!

https://www.koenignorthamerica.com/media/99/bb/0e/1724914303/GA2681810000_Picobello_AQUA-Pinsel-Fix-Klarlack-Matt_Instructions.pdf

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