My home has an attached greenhouse and the exterior wall is fiberglass panels. (See photos) They are old and dingy and I want to replace them. But when I look online for the best products, I'm overwhelmed with promotional writings and don't know how to evaluate what I should be looking for in a greenhouse fiberglass panel. Can you suggest a product or two that is outstanding, or at least give me some criteria to use in evaluating the options. I want something that is durable and as transparent as possible, even if it affects the heat retention of the greenhouse. Thanks.