Thanks for responding Gmorrison. You're right. That was the technique I used. I saw a blurb on the web mentioning putting the decal sheets in the sun. The poster was in England. I said "If it works for him, it should work gangbusters for me in Texas." It took about a month. Everyday I would throw the decal sheet on my dash when I went in to work. Worked like a champ.
My next concern was that they would disintegrate being 50 years old. I used the Microscale decal film and was able to save them. Very happy about that.
I then used the Microscale decal solution for the first time, and I think they came out OK. I was wigged out that I would melt them, but I got a feel for it, and I am happy with the results, considering.
One thing I learned. When I gave the model to dad I said, "Look they (Revell) give you this little jack so the model doesn't tip over." He replied, "No, that is for real. Since the plane doesn't open from the back, everything gets loaded from the side door, back to front, and we used to put those jacks there so the real plane wouln't tip over."
Interesting stuff.