I was thinking of spraying my cover and bimini top with this stuff, as it looks like it will provide some UV protection, but I was wondering if it will hurt the airflow of the fabric. Has anyone tried this stuff and what are your thoughts?
Yeah you'll be good. If you're going to leave the cover on all the time while it's on the lift you might want to think about putting a vent in it. Probably not really needed though.
303 Fabric Protectant will give you UV and great water proofing and still allow fabrics like Sunbrella to breath! We have been using this product on all of our sunbrella covers, goretex clothing etc.