Can I replace or repair the translucent burning coals screen?

You can safely repair it using fibreglass.

Fibreglass kits are sold in car shops for repairing car bodies. A lot of older fuel effect mouldings were made of the stuff before plastic was used. You can paint it when dry if you want to match it in. Left unpainted it is somewhat translucent.
It does smell strongly, but once cured it will be fine.

Lee
March 2009