Hi Andreas,
Welcome to the forum - lovely basses you have there!
Don't wax the body of your Honey Violin Streamer... It's fully sealed.
Do wax the Bubinga body of your Corvette - it's a natural oil fiinsh.
You can choose to wax the back of the necks too (both basses are an Ovangkol neck with a natural oil finish - certainly the Corvette is... I think the Streamer Jazzman is too).
I like to wax the back of the necks... it is good for the timber and I love the feel. Remember the area of timber around the machine heads and the sides of the headstock as well
Some people don't like to wax the back of the neck and believe enough oil from your hands keeps it in good condition. It's your choice.
Regarding waxing... what you want to do is rub it on, let it dry, then buff it (not rub it off!). The philosophy is that over time multiple coats of wax harden and build up a nice protective coating for your bass.
When applying the wax, only apply a little! A little goes a long way. Rub it on with a nice soft cloth, then let it dry - at least half an hour... I leave it much longer. When it's dry and hard, buff it with another soft polishing cloth so it's nice and shiny. Don't try so hard to rub it off.
About every month or so is generally adequate.
Don't treat it as a chore... it's a nice relaxing thing to do in your downtime and keeps you bass in tip top shape.
(remember the Streamer doesn't need it on the body though).
Cheers,
Luke.