Paint spars assembled or separate

[Flytaildragger]

Are most builders painting wing spars assembled or each piece separate?

[Sir Newton]

Personal preference, choice of primer is important imho, I alodine every part separately and applied a sealer primer by brush on the assembly after riveting. I primed the underside of the skins separately.

[geraldmorrissey]

I primed each detail part separately and gave the rivets a light coat after assembly. I used Stits epoxy primer.
Gerry
Patrol #30

[Mark Goldberg]

You should primer each part of the spar separately before riveting it together.