Is that some sort of an EU or Greek restriction on siccatives? Seems like some nanny state regulation to me. How does paint dry without siccatives?
Shellac is a great choice for depth, with quick build and great mechanical shine from mindless application/polishing as you spend quality time with the spouse ( remember to grunt during the pauses, if there are any) after dinner or in front of the tube. French Polish without the pumice. I'm sure you should be able to find other soluble resins or gums to experiment with older finishes as well. Musical instrument makers would have the info.
Tung will build, but it's always had a satin look to me, with interior scatter rather than depth as with the shellac or soy/linseed/walnut oil-based varnishes. Best advice I can give is to wipe and wipe. Once the stuff gets skinned over to protect itself from internal curing, it can take forever.
Harder waxes will give brighter shines, but it will scatter like the tung if you get a bit much on the piece. I use wax to cut the gloss.
Stand clear, rest near, and cut the wood as it wishes to be cut.