[jrumiano]

Whatever you do toss that plumbers soldering paste! The acid in it will destroy traces on circuit boards and corrode wiring. I learned that lesson when I was about 7 or 8 years old building an electronic kit. If you use good quality flux core solder (Kester) that's all you need. Use a wet paper towel to keep the tip clean on you soldering device clean. Clean it every time you solder a joint. If you're soldering wiring a gun in the low setting (first click on the trigger) can work but you need to work fast and not overheat the joint and melt the insulation. If you're doing circuit board work a 25 or 30 watt iron is what you want.

Good luck.

John