rattle-can paint-lost pressure..

Unless you have a air brush, I wouldn't bother with the other methods. I'm convinced that spray can paint differs in regards to that there's certain chemicals that allow it flow. Those chemicals by now are probably evaporated or just not up the job when they were new. I had this issue with the small Testor's spray cans. Seeing I wanted a perfect match, I was able to open the can and use it through my air brush. To my surprise, as I painted the same paint directly over the affected area on the plane, it began to alligator. My thoughts on this were this, as I sprayed to the paint, I had to heavily apply to get it wet enough appearance wise. It quickly skinned over and trapped solvents under the skin causing it too blister. I believe this is because there's not enough open time on the paint once out of the can. I see others online using a product when this has occurred with them called Mr. Color Leveling thinner. This confirms my experience in that this leveling thinner would prevent the paint from skinning over immediately. It generates a longer drying time with more shine. This is a huge problem with enamels in that the top skins but underneath it remains wet for weeks. Unfortunately, the cost of this product vs buying a new can makes this pointless unless your opting for a perfect color match.