You'll want to add the legs after painting. I brush on CS Worm Dip starting with lighter colors first. The key is to build layers to darken and accentuate/add depth where needed. When building your first layer or two as a base, apply heavy to let the Worm Dip bite into the plastic. This will save you time and product. The longer you let a full brush of Worm Dip sit on an area of the frog, the deeper the dip will penetrate the plastic, thus the deeper the color you will get and the less coats you'll need. A lot like water painting in this sense. I can't say I have experience with clearing them, but you might try the clear UV Blast Worm Dip for this.
As for legs, cut the Round Rubber to desired length and tape one end of the strands as well as the center, keeping the overall diameter of the tape used as thin as possible (important later). You can grab ahold of the end with the tape and feed it through a hole on either side. Grab the tape once visible in the hole with a pair of needle nosed pliers. Now you can pull the rubber through and center them on each side and lastly cut the end with the tape. The center section is taped and sitting center of the frog, preventing your legs from favoring one side or the either after being chucked around. If you use too much tape to secure the strands together, you'll have a tough time pulling the legs through the holes and could tear the entry/exit hole- leaving you with a slow sinking frog.
It might sound intimidating but like anything, you have to learn from mistakes and get better as you go. It goes quick once you have a good understanding of the process, and you can make some pretty cool stuff.
Good luck!
