Hehe Since my question here did not reveal the answer I made my own investigation by means of a highly scientific method. My hypothesis was based on logical reasoning rather than IRL experience so as you say, it got to be tested. Hence I made a lot of experiments (read: 2) gluing 2 pieces of 2 mm wide sticks into a cross, clamping for 20 minutes, waiting 24 hours and then, by applying a steadily increasing force with my fingers perpendicular to one of the list with the center of the cross as fulcrum, I tried to assess how many Newton-metre it took to brake the cross apart. In one of the 2 experiment the sticks were threated with sanding sealer and in the other they were not. Thus by empirical observations I can conclude that my hypothesis was wrong Subsequently I have sanded it all back.Well we will know more when you find out how well it holds together.
The lesson is: One thing is to understand a nautical chart, another is to sail a ship