If you follow some of these Tips you will find your sig's can be done quicker and better
1. Ensure photo's are of a good resolution and not too small. Low res photo's do not lend well to being enlarged. They become pixelated and unclear.
2. Background....
If a car is photographed agains't a simple background it is much easier to remove.
Cars parked in front of Houses with the street in the background, car's parked at Car Shows (with thousands of people and cars in the background etc are very time consuming to remove.
You could either take the pictures with a nice backdrop such as a park,lake woodland etc, this could then be kept in, or take the picture agains't something simple like a plain coloured wall.
