I think you nailed it, the paint may have not been fully cured, or at it didn't have the correct amount of hardener in it.
Most likely it will have to be buffed out, or in the worst case sanded and repainted.
I personally wouldn't use cheese cloth or anything with a harsh texture to it. More importantly ensure the paint is fully cured by performing a fingernail test (find an unseen area and see if you can press your fingernail into the paint). Fully cured paint should be difficult to press your nail into.
Lastly, store your armor in a cool environment after fully curing.
Also, when stowed don't allow high points from other sections to rest on long flat areas like the Chest and back plates. These areas are the most commonly seen so you want to protect them to most.
Hope this helps