Quoted from mikespins:You can roll, but it will be more work to sand down smooth enough to install the decals. I've done it, it's not a big deal.
Yeah, I did two cabinets with new decals. First time I sprayed, the second time I rolled.
On the one I rolled, I started to apply a decal and realized the surface wasn’t smooth enough for the decal to stick properly. I believe I then wet sanded by hand with either 400 or 800 grit to smooth the surface…after that the decals went on nicely.
Both projects turned out nice in the end.