HJ Sandman in Tuxedo Black didn't get any blackouts because they were already all black.
Decals on Black would be White only. HJ Sandman decals were either White or Black, no other option.

If you have a HJ Sandman with all the tags. See www.holdenhistoricalservices.com.au and purchase a certificate.
It will confirm the White decals package (if one was supplied) when sold new. HQ and HJ decals packages were supplied by Holden and fitted by the selling dealer.
Or supplied to the owner in the car/glovebox.