I took one of the kids models, an old hellbrute of mine that I don't use anymore and painted up half the fist with Stormshield and the other half with 'ardcoat. This worked significantly better than the other tries!
As you can see the left side is painted with 'ardcoat and the right with Stormshield, and there is a distinct different. Again it doesn't really show up as well on camera as it does in the flesh, but the 'ardcoat is definitely shinier. So, from now on, all the transfers, especially the older ones, will be getting a coat of Stormshield to help set and seal them. Yes, I know that I'd be better off with micro seal and micro set but I don't use enough transfers to justify the cost. The 'ardcoat will be used on gems and glass bits for models that aren't getting a coat of Quickshade.