I'm almost done with my first kit since '85. It is a kit that was given to me and the year on the sprue is 1974. The decals, when applying them, acted old. I have a bottle of "Testors Clear parts cement & Window maker". The question is: Will this work to seal these old decals, without causing a problem? I have yet to weather the decals. Also, so can or should I weather first and then seal? You master modelers just amaze me, and thanks for your help!!! Bob