How do you paint a perfect straight line?

How do you paint a perfect straight line?
11 Tips to Paint Perfectly Straight Lines

Use an Angled Brush. If you are going to try to paint a straight line with just a brush, be sure that it is an angled brush.
Don’t Put Too Much Paint on the Brush.
Draw the Lines.
Use an Edger.
Keep the Edge Clean.
Use a Painter’s Shield.
Use Painter’s Tape.
Let Paint Dry.

11 Tips to Paint Perfectly Straight Lines
  1. Use an Angled Brush. If you are going to try to paint a straight line with just a brush, be sure that it is an angled brush.
  2. Don’t Put Too Much Paint on the Brush.
  3. Draw the Lines.
  4. Use an Edger.
  5. Keep the Edge Clean.
  6. Use a Painter’s Shield.
  7. Use Painter’s Tape.
  8. Let Paint Dry.