Pete,
I had to visit a DIY Shed today, so i chose the old Homebase, now Bunnings.
While walking around I noticed the Rustolium have increased their range of unusual paints and one was Gloss Finish Furniture Paint, in Liquorice (Black).
Don't know how this stacks up against Japlac but it might be worth a try.
I also noticed that they do a Gold and Silver Finishing Wax - A much larger tub than the small jars we can buy for around £10, I'll certainly be giving these a go in the future.