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MarkMK - 5/13/2020 6:30:53 AM

If using a core material like Soric, you are very likely going to get 'print through' on the surface, especially if you're looking to go quite light on fabric weight. This could possibly be overcome after production with flatting and clear coat, but it would add quite a bit of additional expense and labour time. Given the heat it would likely see afterwards, which could quickly cause some shrinkage of the resin and a less than flat appearance, it would be a good idea to post-cure it and then look to have it clear-coated after flatting down again. It would mean additional time and expense, but such a part can quickly begin to look less than perfect if left to the elements without any additional steps taken, given the application.  

Are you intending to mould and replicate the inner structure of the bonnet? If so, this should allow you to go a little lighter on the skin, as it will be supported much like the original. However, this calls for an additional mould to be made but might allow you to utilise fixings for the finished part more in line with the original fitment.

Large flat-ish panels on their own will be quite flexible if choosing to go with a 200g surface layer backed up by something like a 600/650g fabric. This would probably work okay with the inner structure bonded to the underside and a little additional localised reinforcement but it might be worth considering another layer of lighter fabric, at least, if you're thinking of replicating the bonnet as a single skin.