Spray painting metal shelves

[fartingspartan]

Hi,

So looking to spray paint some shelves - White.

Have applied a primer coat last night and it suggested leaving for 24 hours before "rubbing down".

What should I rub it down with? Sandpaper? what type?

I am going to be spraying "gloss White" spray onto it if that makes a difference.

Advice appreciated.

 

[fartingspartan]

Thanks for advice all.

Wet & Dry - is that a B&Q thing or a halfords one?