Wing Spar Prep

[Stalldog]

I put a small scratch on a flange of one spar and was going to buff it out when I thought about the numbers etched into the spar at the factory. I guess they are part numbers and/or serial numbers, but they are MUCH deeper and larger than my small scratch.

Question: Do I need to do anything to smooth out the etched numbers? Hit them with scotchbrite or something? I haven't seen that mentioned anywhere in the instructions.

 

[RV7AJeremy]

You don't need to do anything with the numbers (I did not at least). You will probably need to buff out your scratch. The numbers are made by an engraver/vibrating pencil (lots of small pokes) instead of one scratch/stress riser.

http://www.surplussales.com/Tools-Accessories/T-Aabrasives.html

I bought two bags of these. They work great, are cheep, but don't last too long.

They are great for buffing out small scratches.

Hope this helps

 

[Stalldog]

Thanks, Jeremy, that's what I needed to know. I'll just take care of the scratch and leave the rest.