If you want to fill those somewhat unsightly tooling holes on your RV-12's wing tip bows and stab end ribs, you might want to use the following finishing caps:
-- Hillman Arrow Clips - Nylon (White) #394150-C (for the 3/16" holes)
-- Hillman Arrow Clips - Nylon (White) #394148-A (for the 1/8" holes)
I found these at my local ACE Hardware store.
To seal-up the ends of the foot steps, I used the following plastic end-plugs:
-- Hillman Round Cap Plugs (Black) 3/4"
I found these at LOWE's.
http://imgur.com/cvypRxR
http://imgur.com/sfrHrIh
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David Heal - Windsor, CA (near Santa Rosa)
EAA #23982 (circa 1965) - EAA Technical Counselor and Flight Advisor; CFI - A&I
RV-12 E-LSA #120496 (SV w/ AP and ADS-B 2020) - N124DH flying since March 2014 - 940+ hours (as of September 2020)!

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AF donation through June 2021.