Dealing with seams in tires.

At least here is how I do it for landing gear wheels in aircraft.

I use the following tools. 

Spru cutter.
Self-gripping tweezers.
UMP Sanding Sticks
Flex-I-File Sanders
Toothpicks.
Something to hold the toothpicks. In this case Mr. Paintstation.
Craft glue (not pictured).

The F-18 Hornet I’m currently working on has some rather pronounced seam lines on the tires.

Using the UMP sanding stick I sand what I can while the wheel is on the spru.  I sand just enough to remove the seam, but not so much to create a flat spot on the wheel.

The wheel is then cut from the spru.

By using the self-closing tweezers I have a good grip on the wheel to sanding the two attachment points.  I then finish up any areas that need it with the Flex-I-File sanders.

The wheels then are put onto toothpicks using the craft glue in preparation for priming/painting.