any advise? I have used lighter fluid for boxed figures to open safely and it does not ruin the boxes (be@rbricks/kubricks etc) I don't know how it would do with the glue on carded figures. who knows tricks?
maybe use an iron on the back of the card? If you do it right you may be able to pull the plastic away before it melts. I used to open my kubrick boxes with an iron to keep them nice looking. it might work the same.