You can use tweezers or "alligator" clips with these small pieces as you use the heat gun to set the powder. I love the All Purpose mat from Close to my heart as you can use the heat gun right on it and all the powder can be wiped off easily. I was in a hurry and used the foam part of my VersaMat to put the powders on. I didn't put the heat gun near it but I can still fill the grit of the powders when I flip the mat.
The Clear VersaMark in is good for all the powders. There are time you want to have colored pigment in and either the clear powder is best for that. You can use any of the pigment inks with the gold, silver, white or clear powders. You will get different effects by using different colored papers. Have fun with your imagination and get you heat gun and powders out to experiment.