basd on solvent welding my styrene droid I'd say give it a solid 24 hours prior to sanding.. especially right now as its not as warm out to drive the solvents out. i would actually recommend starting at like 200grit and working your way up to the 400 then 600 wet. you may actually find that to get it super smooth to move to a 1200 after the 600.. then a plastic polish and a rag to take swirls and scratches out(usually the plastic polish is about 2k-3k grit) for that smooth plastic glass finish.
yeah you should def be good to go. once you put that cover strip on and if im looking at it right the ammo pack you wont ever even see it! Lots of good progress! sorry I havent chimed in for a bit.. been taking a small slow down from everything but building my clone armor! cant wait to troop with ya! TKs FTW!!