Welcome aboard.
Soak the decal in a slightly warm water for 10-15 secs.
I then apply MicroSet to the body and then place the decal down on to the body. Using a really soft brush i apply MS again and allow to soak for a minute or two. Move the decal around so its in the correct place and then lightly start to brush the excess water out from under the decal.
Keep doing this till its all out and you have all air/bubbles etc out. Keep brushing so that its all sitting down nice.
If its not sitting down well in places.....use a hair dryer on warm and "very carefully" warm the decal up while you brush it down into place.
Go to
www.tamiya.com , then the "tips" page....has info there to.