I bought a pair of ikea poang lounge chair, although they are for indoors I want to use them in my balcony which has undercover. It won’t get rained on. The balcony faces north so does get some sun but not harsh.
the frame is made of layer glued wood veneer, oak veneer, satin and clear acrylic lacquer.

what products do you recommend me using to protect the frame and make it longer lasting? I’ve looked around but I’m confused which varnish I need to use. I incline to use clear ones so it doesn’t add colour but open to suggestions. The frame is oak colour. I’m worried because this frame bends when you sit on it it affects the type of product I should use.
Please advice any specific preparation I need to follow ie if I need to sand it or something like that
thanks!!