[googlryas]

Will this internal drying of the liquid paint affect the looks of the painting in any way? ie will the painting look different in 100 years than it does today, assuming it is kept perfectly preserved and untouched in the ideal environment?

[jacquesm]

No, but it can lead to trouble when the painting is re-framed or cleaned because any kind of manipulation of the canvas can crack the paint. This is specialist work (especially on paintings with this kind of value) so they're in good hands but the problem is much less pronounced with thinner layered paintings.