Thank you Rick, Lance and Willem for your support!
I go back to my good old trusty MicroScale clear coats (never change a running system!).
BiplaneThe landing gear was prepared yesterday and later painted

One Ikea drawer with a lot of prepared parts for a long mounting session.

A check reminds me that the steps are needs to be done before! The four steps (one spare) should be bend and glued in place. I don't like that because they can bend easily completely or break off.
So I drilled 0.3mm holes for a brass wire.

The wire was soldered from below, here in comparison to the real step. The steps was mounted to the fuselage structure.

All four prepared:

After drilling holes and cut the wires I could mount the steps in a safe way.

Then I glued all the prepared parts in place.

After final mounting of the engine I added also the cowling

I annealed lightly and prebend a 0.2mm Nickel-Silver wire and glued it around the cowling as securing rope.

The wings are prepared for the rigging session.

At first I mounted the upper wing, the side struts and lower wing.

Now it is a biplane!

I wanted to mount the landing gear too, but the last of the four pins do not war to go in his hole. With bigger force I broke the complete gear off.

So I have to remade the gear in metal. Thought about that earlier but refused the work ...
Cheers,
Frank