40k Space Wolves & Daemons Boot Sale Bargain - Help Lawnor identify and fix please (Spring Cleaning)

I was having a chat on the forums about iconography, chapters, division etc, and transfers, and @Rayzyr was awesome enough to offer to post me his old Space Wolf transfers.  He’s sent me quite a bit too so I should be able to cover everything.  Some of these have 1989 printed on them which makes them around 30 years old (which makes me feel very old!) and as a consequence of their age they have yellowed a bit.  This might not matter if I place them on yellow shoulder pads, but it might, and it will on any other colour surface so I’ve looked in to ways to recover them

A google hunt led me to a video which said that placing them in direct sunlight for a few days can bleach them back to their original colour.  The guy was talking about waterslide transfers for model cars, but the technology is surely the same?  He loved in Scotland and a few days to a week was enough for him, so the British sun should be equally capable.  (I do love that they have travelled from Australia to England in the winter to then be placed in the sun!)

I have Blutacked them to a folder clipboard and it is currently stood like a Christmas card on my bedroom windowsill being careful to ensure no condensation can possibly get to it.

I’ll report back later with the results of this experiment.  If anyone has any advice to offer with recovering these transfers, or using them I’d be interested to hear it.  I do not own any Microsol.  I’ve always been fine applying transfers over a gloss varnish with just water, and then sealing it with more varnish.  Does their age really preclude this method?

(PS I’m almost done with the infantry in the previous entry.  I’ve just the basing and transfers to do.  I’ll update the previous entry when the basing is done.  Most of the work is the same as for the entry before anyway.

They were left in my window for 11 days at the tail end of birtish winter.  There were maybe 2 good days of sun right at the end.  However it appears to have done the job.  See for yourselves.