The big problem with Tamiya paints is that after some time without using them they are almost impossible to open. You can normally force the upper part with something to get rid of the dry paint and open it, but this makes that after some time it will dry ever more tough, so eventually you won't be able to open it and in the worse case it will drip paint everywhere...
Get your rebel paint, I used this image because you can see the dry paint, thats the reason why they are stuck!

Use a water boiler to get some really hot water (duh!) And introduce the paint carefully with out burning your fingers like in the image

Voilá!Now it opens as if it was new...
