Will these fit my wheel studs without modification?

M12 x 1.25 is a standard aftermarket bolt pattern. Test-fit one nut on a stud before installing the full set to confirm thread engagement and seating.

Do I need to torque these to a specific value?

Refer to your vehicle's service manual for the correct torque specification. Aluminum hardware requires careful attention to avoid over-tightening, which can strip threads.

Can the light blue finish be painted or sealed?

The finish as-shipped is ready to use. If you want to change the color or add a clear coat for UV protection, clean the nuts thoroughly and apply standard automotive paint or sealant.