I help my brother 2 kids the won 1 & 2 at pack 1 & 6 at district and 1 & 3 at council. here is what was done.
Pack: the only thing different were the axles zinc vs revell. both used revell wheel prepped with novas #2 (do this 2 times to get it looking acceptable),
Meguiar's NXT 2.0 wax. both used lemon pledge and winderby graphite. both polished axles to 8,000. They ran 3.04 on the 1st 2 runs and lost .01 sec every race after. final times were 3.10 and 3.13. this was NOT acceptable for district racing.
District: 1st place car we moved to BSA wheels and we re prepped all wheels on both cars with novas #2, zero friction, and red rocket, my brother used the wrong graphite some" tube of graphite" (this is junk stay AWAY) the times were the exact same only the times fell much faster especially for car #2 on revell wheels. .012 to .015. the last race the 1st place car was slower then the 2nd place car but the average time keep him in 1st.
Council: we re did all wheel with the new black ice system, and use the Hob-E-Lube graphite the run times dropped and held consistent longer and only dropped a total of .05 off the average times on both cars. final times were 3.04 and 3.05
both cars were near identical in all aspects but the axles and wheel change. I would say use the revell axles if you cant use any other aftermarket axles. and polish with 2000 or higher. did I see speed difference in wheels? NO only in polishing BSA are easier and look shiner. I wouldn't use the BSA axles it takes to long to remove the crip marks and polish, when I did this the diameter was much smaller then I would ever use ever again.