When all the layers of paint and glue are thoroughly dry, use your fine pointed tweezers to gently pull down the fringed layers of the petals to shape the flower into a rough dome. The easiest way to do this is to take the outer layer in your tweezer blades, and gently roll it until it is at a right angle to the wire center.
Continue working around the flower, teasing out the various layers as you go. If your flower looks unruly (usually because the layers weren't glued on top of each other as you formed the flower) use your scissors to trim out of scale petals to shape.
If you have trouble teasing your flower apart because it is very tight. You may need to tease the flowers before you glue down the next layer. This will depend on how tightly you can roll the tissue paper around the wire, and how large you have cut your fringe of petals. Experiment and find the method that works best for you.
If you need marigold leaves the easiest way to make fine leaves that look like they are from marigolds, is to use green dyed reindeer moss in small sections. If you have very finely cut leaves from paper punches, you can attach them to the stems of reindeer moss to create marigold leaves.