remove unsightly brush marks

If you're still painting interior doors with a paintbrush, chances are you are left with a surface that isn't very smooth. No matter how hard you try you will always have brush strokes on the finish.

There is a way to achieve a perfect finish:

1. Allow the new paint to dry completely. To be completely sure leave the paint to dry for 10 days. If you don't want to spend a fortune on sanding paper this is necessary to avoid clogging the sandpaper.
   
   
2. A Random Orbit Sander is the best sander for this type of project. These sanders do an excellent job of removing surface defects when equipped with the right paper. I also recommend that you use a Bosch Random Orbit Sander, as these are fitted with a Micro Filter System that allows dust to be channelled from the project surface into the filter container, allowing for dust-free sanding and less mess.
   
   
3. If, when you start to sand, you don't see any dust and the paper has started to clog with paint, stop sanding and leave the paint for another few days. Once you start sanding, the surface of the door should be very smooth to the touch after you run the sander over it a couple of times.
   
   
4. Sand the entire surface with 240-grit sandpaper. Wipe clean with a slightly damp cloth to remove all the dust.

There are now two options for you to consider:

Rust-Oleum Polyurethane Spray Varnish
Use satin, semi-gloss or gloss to spray on the perfect finish.

Roll on Polyurethane Varnish
Use a foam roller to apply a smooth, even finish to your doors.

...janice anderssen - diy diva