Prepared the next 6 (of 16) Spar Reinforcement Plates and the Spars for riveting and bonding by cleaning with denatured alcohol. Riveted and bonded the 6 Plates onto 2 of the 4 spars. Total of 14 of the 16 Spar Reinforcement Plates are now installed. Also, one of the rivets did not appear to "seat" properly, so I will have to drill that out and re-rivet.