I just inherited a used 6x8 HF greenhouse. None of the panels appear to be useable for transmitting light. I'm familiar with some of the videos and blogs explaining how to upgrade its strength and protecting new panels from UV, but my panels are already useless. Can poly sheeting be used instead of buying new panels. If so, is there a special type of poly used for greenhouses. Any good videos or projects documenting how to go about it. Thanks.
