I have found I have the best luck using these steps
1 - cut your tissue so that it is just shorter than the height of your candle by about 1/4 inch and so that it wraps around your candle and JUST TOUCHES the other end...this is very pimportant so that if you are trying to get the stamped images in the middle you know where your middle is and also if your start stop place with the tissue is a little "unperfect" it is to the back of your candle when displayed
2 - Stamp your images on the tissue paper, always work with a scrap paper under you as the tissue is thin and will bleed... after you have stamped your tissue wrap it around your paper and I find a little moisture to the edges will help them "stick" to the candle just fine...
3 - Take a strip of waxed paper just thinner than your candle and wrap it around your candle to use as a HANDLE...hold the two ends of the waxed paper so that you don't have to touch the candle...you want it to be TIGHT AGAINST the candle...
4 - HEAT...now this is THE CRUCIAL STEP. First of all let your gun warm up for a few seconds until the air coming from it is HOT...then start in a very methodical motion going from the bottom to the top and off the edge and then from the top to the bottom and off the edge...just like you were spray painting. You will see the tissue "disappear" into the candle when the wax begins to heat...DO NOT OVER HEAT! It leads to UGLY DRIPPY MESSY CANDLES...not to mention work space!! LOL
5 - after the first two - three inch section is done MOVE THE WAXED PAPER to the next section and repeat step four...
6 - A few tips I have heard that you may want to try are
Adhere the tissue with a touch of glue stick at the "seam point"
Use a heated spoon to smooth over any bumps or drips...however I find that going from one end to the other quickly results in a no drip application for the most part
You can emboss your images on your tissue with the different embossing powders
and you can do colored candles but I find the white or cream work best for beginners!
Hope this helps