Tools/applications for designing paint scheme?

[MountShasta]

My 1973 Piper Arrow 2 is sporting its original paint scheme and having been outside most of its life here on the West Coast, she's in need of a new paint job.
I've searched some threads here for postings on various paint jobs and i have found some nice photos etc, but what I'm looking for a recommendation on is how to go about actually designing the paint job for the airplane. I would imagine there is some application that allows you to create a virtual paintjob? I found some commercial websites where i gather you can buy a 30day membership to get access to photos of thousands of paintjobs. Still, i'd like to be able to create the scheme myself

 

[ScottS]

 

[voretaq7]

 

[Charley]

 

[PaulR]

 

[magman]

 

[hornet02]