These are the "SD Gundam G Generation 44 Gundam Double X" and the "(1st Old Kit) 1/144 Char's Z'Gok" that I'm currently working on 🐱
For the Double X, I'm focusing on filling in the hollow areas.
For the Twin Satellite Cannon, I molded and duplicated the side with the proper detail and then fitted it over the hollow areas. For the Beam Rifle, I filled it with epoxy putty and sculpted it to look similar.
For the duplication, I used "Mold-Thinking" to create a mold, then applied a thin layer of "Tamiya Light-Curing Putty" and let it harden ✨
I'll do a little more surface treatment before painting.

[Under Construction] Gundam Double X and Char's Z'Gok (in that pose) | クラフト's Gunpla works