Hi Andrew – while I’ve not used the laser version of waterslide decal stock, I do use the inkjet version. I use the waterslide stock available from SmallBear. And yes, I would still anticipate the need to clear-coat the laser decals before soaking them in water. For what it’s worth, here is the video tutorial I used to get up to speed using waterslide decals, and with much success . . . .
Hope this helps