For this you will need acetone, gasoline, white spirit.
How to clean paint brushes
Any solvent must be poured into a container and the instrument placed there for a while.
As soon as the paint layer softens, remove it with any cloth or scraper.
It is best to wash the instrument under water until it is clean.
How to clean dry paint from a brush
The brush again needs to be cleaned first with a paper towel.
Then mix the conditioner with water in a ratio of 30 milliliters per liter.
Rinse the brush in the resulting solution, remove excess moisture with a rag.
This method will help not only clean the instrument, but also maintain the softness of the pile.
Heat the vinegar in a container not used for cooking to a moderately warm temperature (30-40 degrees), and place the hardened brush in this container.
The vinegar will gradually break down the old paint. Periodically (once an hour, but more often) check whether the fibers have begun to bend.
How to properly wash and dry brushes
An important point: rinse your brushes thoroughly with clean water.
Dry your brushes upside down.
After you have completely rinsed off the cleaning product, carefully shake off the water, blot the lint with a paper towel and squeeze it out a little.