Yes it's fun and most interesting! Asking for the Skylane had a certain motive, of course. I spinned Zlins and Cessnas, but no aileron was used. While the Zlins needed the usual recovery method, the Cessnas were different - more like models. Actually, they are made to be hard to spin, but if you know how to do it it's surprisingly easy. (The aerobat has the old unmodified airfoil and plain wingtips, while the newer Cessnas have the drooped nose and Hoerner wingtips and are even harder to get spinning.) Of course, you may manage it unintentionally (Denker mentions such a case) so fortunately it's easy to stop the spin: let the controls go - like with most of our models.

Therefore I would search for the reasons of the "abnormal" behavior in the aerodynamic layout and distribution of masses. The gyroscopic forces may play a role if the propeller is large and heavy and far ahead of the C/G (like in full-scale Zlins), so recovery from a left-hand spin might be hard. I think models show that only in flat spins (much power), but I have to admit I never calculated/guessed the inertia moments. However, an indication is that models don't do the real Lomcevaks like full-scale planes, which are gyroscopic-force maneuvers.

In the simulator, I can deliberately produce that delayed stop of spin by making the model heavy and the moments of inertia bigger (damping unchanged) - or vice versa. So maybe the case is rather simple in reality as well. Just a thought.