Get a bag of disposable brushes and a fine nap roller for larger pieces. Faster and easier.
Apply three coats.
When your ready wash em off scuff with 400 or red scuff pad and continue.
The key is to have those two coats as the foundation. Don't sand them off.
Since SPI comes in grey, white and black I like to set the bottom in one color then use more for my 'build' in a different color.
That way as soon as I see the first color I know to stop.
Have fun but use protection...
