FRP paint?

I was thinking of using an acrylic primer with an acrylic paint to paint my FRP siding on my CaveMan build.
I've finished the siding and my friend swears I need fish eye eliminator and a flex agent, and I must use a scotch pad on the FRP and not sand paper.
My plan was to use sand paper to rough it up and a scotch pad to revome excess caulking, then hit with the acrylic primer and paint... using a high grade roller
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I've finished the siding and my friend swears I need fish eye eliminator and a flex agent, and I must use a scotch pad on the FRP and not sand paper.
My plan was to use sand paper to rough it up and a scotch pad to revome excess caulking, then hit with the acrylic primer and paint... using a high grade roller

Sent from my SM-N950U using Tapatalk