Quick question on Tamiya Fine Primer

I just sprayed some of the primer yesterday and right now I went to check on it and it's really smooth, almost like bare plastic. Should it be like this and should I sand it to roughen up the primer? Thanks!

Sorry, but I checked the FAQ and no help

If you are to use Tamiya spray cans on the primer there's no need to roughen it. The top coat will stick just fine to the primer as is. But if you spot any irregularities, putty, sand them and prime again 'til you're satisfied with the looks of it.

Niclas