For both small and big gaps, get a small syringe with a needle. Fill the syringe with the same liquid resin used to make your model. Squirt a little at a time while instantly drying with a UV light. I make giant models like this all the time and this is by far the best, quickest and easiest way. It will also instantly hold together hard to hold parts that super glue won't. On big pieces put a dot of superglue in the center. Hold the part. Put a dab of resin around it and use the UV light. Holds instantly. You can get good enough to do this along with adding extra detail (If wanted).
@@ronniejones8577 I've tried this, as well as adding baby powder to the resin to thicken it. I have issues with losing details on the model making the gap still visible, sometimes worse than just the gap. I want to make them disappear and still keep the details such as dragon scales but not good luck with it so far.
