Alodined all cleaned parts. The assembly instructions state that primer is required only on non-alclad, non-powder coated parts. It furthur states that the fabricated HS-908 angles are the only non-alclad, non-powder coated parts. I dedcided to Alodine everything except the skins. Depending on how crazy the process gets with larger kits, I'll decide later to either clean and Alodine everything or only the required parts. I'm not using spreay primer... only Alodine for surface anti-corrosion protection.