I think I spoke too soon, and I nearly had a thrombie when I saw what's shown in the pics below !
The decals that have been applied so far, had been in place since Tuesday evening, so, as a couple of areas not yet decalled really needed a little more of a gloss finish, I attended to that, and also sealed the decals with a thin coat of Humbrol Gloss Clear, late last night.
Aaarrgh !
The code letters wrinkled, as shown !
None of the other decals were affected, apart from one character in the serial numbers whih was very slightly 'bubbled', and they're all from Xtradecal, with the exception of the fin flashes, and the 'Keep Off' stencils on the rad covers.
I've never seen this happen before, to this extent, although the RAF Mitchell I did recently had one code letter very slightly wrinkled, but nowhere near as severe as this !
Thankfully, when I checked the model a few minutes ago, the code letters seem to have settled, apart from a couple of tiny wrinkles, which I think can be pressed out.
The effect was rather like what can be seen after applying Micro Sol or Micro Set to 'raw' decals, only much more severe, and I can only think it happened due to the extremely thin carrier film.
Hopefully, now that the decals are sealed (or at least I bl**dy well hope they are !), they should be safe when the matt clear coat is applied.
When I did the decals on the Mosquito NF.XII, the code letters were also from Xtradecal, but I didn't seal them with gloss, just spraying the clear matt after they'd settled and set after 24 hours or more. In future, I think I'll stick to that practice.
Anyway, I'll leave the model for another few hours, in order to ensure the 'new' clear gloss has fully hardened, then finish the stencil decals. The clear matt will be sprayed when I'm confident that all the 'new' decals are really stuck down fast !