One of the biggest factors in causing the fine scratches (swirl marks) is the error when washing your bike a custom paint, so do not underestimate this problem. Here are the steps:

1. Shampoo

Car shampoo / motor to paint oven is best to use bike wash, do not ever use detergent (dab of soap, laundry soap) to wash the body, because it implies a very loud and not appropriate to paint our motors.

2. Water spray

Spray with water around the motor, especially the paint oven, making sure that dirt and dust is gone, and then flatten foam shampoo starts from the top first. Repeat until completely sure if the motor is completely clean. Spray the section that had been cleaned up to the rest of the soap is lost and really clean.