Many people are afraid of painting wooden doors.  

The two main arguments generally go as follows

Once you paint you can never go back. This is not exactly true, going back to wood is a hassle and is time consuming.  The other point we make is why would you want to go back?  Once you have painted you have a choice of all the colours under the sun why would you want to go back to brown?

It's a waste to paint real wood is other argument that often comes up.  Paint will preserve the wood. Painted wooden doors are actually well protected from the elements and will generally be in better condition under the paint 20 years on than a door that is not painted.  

A new coat of paint on your front door can breath all new life into your home, and it’s a lot easier than you may think!  Yes, you will have to put in some elbow grease, but it shouldn’t take you more than a day to complete.

Because your front door is open to the elements outside, you’ll want to use an acrylic latex paint with an oil-based primer; this will cover any old paint left on the door.  However, if you have a brand new door that has never been painted, you are able to use an oil-based paint instead.