I generally use an oil-based primer to start, because of its superior penetrating ability and because it will not be degraded by the wood's natural oils as they leach out (cedar is especially prone to this effect). After priming, a good-quality latex top coat will hold its colour much longer than oil. Ideally you should apply one coat of primer and two top coats, but a time and money saver is to have the primer tinted to match the finish colour, then use only one top coat. Bear in mind, though, that this approach will diminish the life of the paint job.
No if you get new wood you do not have to wait to paint it
Most paint dries faster on wood.
The advantage of using paint for wood is that it makes the wood look nicer. The disadvantage of using paint for wood is that the wood as no real protection and it can rot and get damaged easily!
Varnish preserves wood better than paint.
Veneered wood has very much the same surface as any smooth wood. There are no specialised techniques to paint it.
I use TiteBond 2 for balsa wood.
makes wood shine
You can try to remove chalk paint from wood using mineral spirits. Paint remover may also work, but it may strip the paint.
It colors it.
No. If you have old oil paint that is failing, cracking or alligatoring, the new paint will fail as they are expanding and contracting at different rates. In order to have a good, long lasting paint job, it must be stripped to the wood.
You should never burn wood with paint on it unless you know, specifically, what kind of paint it is, that the paint is question is safe to burn, and that there is no other chemical treatment on the wood. There is such a thing as paint that is safe to burn, but you should never assume a given paint is safe. In particular, you should avoid burning wood with lead based paint on it, and much of the old paint was lead based.
the wood will burn but the paint will melt .