First it's best to make sure you have a gloss surface.
Yes you still need to soak your water slide decal in water.
Take a soft haired paint brush and put some Micro Set on the location where you want your decal. Then use the brush to slide the decal into place. Put a little more on top and wait. then use a paper towel or cotton bud to press the decal down. (I use a piece of chamois) 98% of the time your end up with no bubbles or silvering. If you see any silvering, add a little more Micro Set, and wait a while and press again.
The Micro Sol, is stronger, and is used to help your decal snuggle down over details, and sink into panel lines. It makes the decal very soft, and even more easily damaged, and if you touch the decal it will get destroyed. If you press on it when it's wet, you'll find the decal ink sticking to your paper towel or cotton bud. You simply apply, and watch what appears to be the decal self destroying itself. So let it dry on it's own, or you can speed up the drying with a hairdryer on low. As the decal dries it will flatten out and conform to the surface.
These products were designed for Micro-Scale/Super-Scale decals, and may react differently with other manufactures decals. So it is best to try on a spare decal to see how it going to react first. On some other manufacturers decals they will have no effect, on others they will totally destroy them.
Character is what you do when no one is looking.
Few things are harder to put up with than a good example.- Mark Twain
Make yourself an honest man, and then you may be sure that there is one less scoundrel in the world.--Thomas Carlyle