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i really hate to be "that guy" but those joins dont really look that strong i tought you'd you packing it all in there?... i like the steel plate bit, but are you gonna reo around the vent holes? where you can see the lighter coloured 'stretch marks'
your front bar (i know you know, but just bringing it up) is under a lot of force from the wind. itll want to be toughened up or itll just re-crack again. which would suck if you painted it.
Agree with Ari, you want the repair layer to be about the same thickness as the bar itself for optimum strength, then you can just use bog on the front to make it flush. The reinforcing plate is a good move though.
laid some more sheets of glass down today. its feeling pretty solid now, so tomorrow ill start filling holes in the front. ill grab another sheet of fibreglass from work, coz i still want to strengthen the back some more, but its strong enough to pickup with one hand and not fall into pieces.