Topps Magic Photo question
 

I was just wondering if there was any way to develop under-developed cards from the 1948 Topps Magic Photo set. I assume there is no way to do this, but I thought I might as well ask to be sure. Thanks!

I have heard - but not confirmed - you can moisten the surface (lightly) and expose to sunlight and further development will occur. I have never tried this but I have a Hocus Focus card I may try it on someday.

Yea, I'm really tempted to try that. Has anyone developed a card using this method (just wetting the partially developed card and leaving it in the sun) who could comment on the results?