JOHA Hammerl oil varnishes apply very well and practically anyone can do a good job and get a good result. These varnishes are elastic, but not as sensitive to heat and wear as spirit varnishes. The drying time of oil varnishes is relatively fast. Each coat must be perfectly dry before the next coat is applied in order to prevent subsequent cracks.
The difference between Primer, Colorless or Colored, and Coating is the hardness and gloss.
Primer is the hardest varnish and adheres best to wood.
Colorless or colored varnish is a medium hard varnish.
The coating is the softest and brightest varnish.