Months ago, this is what I was attempting to do when attaching text to a compound surface that is the bow of a ship. I figured out (eventually, the hard way) that I couldn't get text onto the surface (easily?), so I thickened the surface. ( Then, I made text and extruded it, then split it from the solid of the ship's shell plating. The text had some excess size so I could move it and a guide surface onto the shell plating and split it. This gave a "raised" surface effect. However, it was problematic, and I eventually gave up when a co-worker commented that for labor costs, today, most ships' names are just painted on the surface, and no expensive bead welding is raised to be painted.
IIRC, later I "projected" text to a surface and treated it as a banner. But, IIRC, surfaces I was dealing with had too many intervening curves embedded, and the spread of letters always landed inconveniently on a curve. So, making extruded text become split was painful because the intervening curves did strange and wholly undesired things to the text. Now that I've been experimenting with curve and surface quality settings, in Freeship, I may have removed unwanted curves that would otherwise appear after turning the mesh into a surface. Now, I just use much finer and appropriately-spaced stations, and I hope I'll get letters of the right spacing on those surfaces.
Still, it would be nice if one could stencil text onto a surface (whereby VCP/Shark would make a "text background base" that is not ravaged by embedded mesh or surface facet curves, and that base follow the models' curvature, so the text is smooth...), with the intent to have 'banners" like on model trains, planes, ships, cars, etc, set a reasonable amount of curvature lifting from the surface, and, and, AND, be able to rename it easily, in the event of spelling error or renaming airplanes or ships to make multiples of a same class or family/production line for display purposes.
Part of the problems I had, as others pointed out, involved punctuation and certain letters and certain fonts failing to project or extrude.