"[b:654c4848f0][i:654c4848f0]<font color="#6699ff">Any other ideas?[/i:654c4848f0][/b:654c4848f0]</font>"
This is one method of removing the rear wheel hub cap.
[b:654c4848f0][i:654c4848f0]<font color="#ff0000">Please be mindful of common safety steps; expressed or not.[/i:654c4848f0][/b:654c4848f0]</font>
Lift the rear tire and rotate until the rear wheel hub cap is horizontal.
Apply penetrate between rear wheel hub cap and rear wheel hub.
Tap the rear wheel hub cap with a small sledge hammer.
Rotate the rear tire 180<sup>o</sup>.
Apply penetrate between rear wheel hub cap and rear wheel hub.
Tap the rear wheel hub cap with a small sledge hammer.
Repeat previous three step process several times.
Rotate the rear tire 90<sup>o</sup> until the rear wheel hub cap is vertical.
Loosen hex nuts until flush with top of cap screws.
Apply penetrate between rear wheel hub cap and cap screws.
Tap each cap screw with a small hammer until the hex nut is flush with the rear wheel hub cap.
Remove all hex nuts.
Apply penetrate between rear wheel hub cap and cap screws.
Apply penetrate to the key and axle key way.
Tap the rear wheel hub cap with a small sledge hammer.
Put a punch on the end of the cap screw and tap with a small hammer.
Repeat previous three step process until each cap screw is removed.
Hope this helps.