Grit Guard Experiment

Aim: To test the effectiveness of Grit Guard.

Problem: How to reduce the chance of inflicting car wash marring.

Tools: Grit Guard, Buckets, Mothers Lambswool Wash Mitt.

Materials: Tap water, Meguiar's Shampoo Plus.

Hypothesis: The side washed with Grit Guard will retain more dirt and grit in the rinse bucket.

Variables:
(a) Manipulated: Grit Guard in bucket.
(b) Responding: Amount of Grit after washing.
(c) Fixed: Shampoo, tap water.

Procedure:

1. The whole car is rinsed with normal hose pressure, taped in half.
2. One half is washed with the two bucket method without using the Grit Guard.
3. The other half is washed with the two bucket method with the Grit Guard.
4. Rinse bucket is checked for amount of grit.

Observations:
Rinse bucket with Grit Guard has about 70%-100% more grit than rinse bucket without Grit Guard.
The rinse bucket with grit guard trapped lighter grit better than the rinse bucket without the Grit Guard

Inferences:
The vanes at the bottom of the grit guard prevent water from being swirled when agitating wash mitt in the rinse bucket. By keeping the water at the bottom of the bucket from swirling, grit has a lower chance to travel upwards to the wash mitt.

Conclusion:
The Grit Guard does work to help retain grit in the rinse bucket and may reduce the chance of inflicting car wash marring.

Thanks to Kok Yi for your help and input!