sure can but use Marine grade that is made for; more expensive but you won't have to keep spending $ to do it again when porch/deck paint flakes off; after stain you still need to seal it with something to prevent rot.
I was wondering if you could help me with something -- I have an entirely oak kitchen. I know it's the rage now to paint or gel stain cabinets. I've been considering ...
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If it's made for exterior use and has UV protection, yes, you can use it.
sure can but use Marine grade that is made for; more expensive but you won't have to keep spending $ to do it again when porch/deck paint flakes off; after stain you still need to seal it with something to prevent rot.
Here is a website that can give you the answer along with reviews on some products you can use... https://www.deckstainhelp.com/apply-polyurethane-to-a-deck/
It may make it slick. Ask a paint store what is best for your area.
This article suggests it wouldn't be a good choice to use it: https://www.deckstainhelp.com/apply-polyurethane-to-a-deck/