Agreed about the "sun curing" (probably from UV light) and cleaning with isopropyl alcohol. In my experience, though, the uncured gooey resin was usually inside a superstructure part and removal of that goo did not affect the shape or suitability of the part in question. As for Simon's question about how I built so many models, the 3D-printed kits are easy to assemble once you have the parts separated from the casting cages; the issue I have had with them is the usual total absence of assembly instructions, requiring significant time to research photos or diagrams of these ships to ascertain where those parts go. Since most of these Chinese kits (if not all of them) are derived from video game images, whose accuracy must be assumed, screenshots of the game websites can show where the various parts go and how they should be configured. Most problems arise when smaller parts cannot be identified in the imagery and yet are present, often in excess, in the kit. Also, being retired with time on my hands helps significantly!