Ya can't beat the professional decals but on my home brewed franken bikes with rattle can paint the GettoCals do just fine - Here are some simplified instructions for printing a GettoCal...

Click on the image several times to get it to its highest resolution then right click and save a copy to your computer (If you can't get it let me know and I will e-mail it to ya)

Open up the file with GIMP or Photo shop and change colors or contrast as you want then save it without any compression (remember I already have most of mine set to a format of about 10"x3" which is a regular bumper sticker)

Upload the image to a bumper sticker printer - I like the vinyl bumper stickers cause they are cheap and very durable - There are many bumper sticker printers that can do this - I use Buildasign but any will do a pretty good job

www.Buildasign.com >
Bumper Stickers >
Click here to start from scratch >
Upload image >
Browse (to find your image file) >
Upload >
Stretch to correct dimensions >
Save and continue > Checkout & Pay