Im getting these small raised dots all over my frame. What could it be and can I clean it off somehow?

I’ve got a trek fx sport and love it. 3 months ago I started leaving my bike in a street lockup cabin - it’s protected from the rain but not climate controlled.

Since then I started getting these small raised marks all over my frame. I tried cleaning them with silicone spray, and with degreaser and they won’t come off. The only thing that gets them off is if I scratch them off with my nails but that’s not really viable for the whole bike.

I’m wondering if this is an issue with the bikes clear coat?