![Embarassed :oops:](./images/smilies/icon_redface.gif)
I grabbed an unused seven blade high speed fan (panny BX) and cleaned all but one blade with 90 percent alcohol and left to air dry. The one blade was just wiped with soft cotton. I then waxed three blades with non abrasive carnauba paste wax.
After a few days, the blades with the wax had a very light coating consistently covering the entire back of the blade (the front doesn’t collect dust). The alcohol cleaned only blades fared better. The dust did not cover the entire blade - more areas of clean black blade was showing and dust is in a streaked pattern in the direction parallel to the airflow. The one blade not cleaned with alcohol but just wiped down was the cleanest. It had dust, but there was a higher percentage of black clean blade showing.
With such little dust on the fan, I was getting impatient. I sped it up by going around the house looking for the dustiest stuff and blowing off the dust with pressurized air can in front of the fan. Unfortunately, it marred the results as some dust particles/dust bunnies had actually wiped some of the coating of the blades in spots and may have knocked off any thicker coating that was pre-existing. Anyway, the blades with least amount of dust are now the ones wiped clean with alcohol .
Not the best test but so far I feel that waxing is not worth it. It may even attract or certainly not repel dust. I will update if long term results are different.