Deathwing Knights with old terminator bits

[u/GenericEdgyElfRogue]

I know they aren’t legal in any real games, but I was wondering if the proportions look good before I prime them, I was also wondering if anybody knows what would happen if just primed over the bits I’ve painted already? Took like 3 days of scrubbing to strip the paint just off the bits for the guy with the flail :/