Thermoluminescence dating is generally not very accurate.
The accuracy of thermoluminescence dating is only about 15% for a single sample and 7 to 10% for a suite of samples in a single context.
Instead, a less sophisticated method that would deceive TL testing is to reuse original broken and unmarketable pieces.
Forgers commonly use the bottom of an original broken vessel, which has no commercial value, and make a new fake vessel on top of it.
Saying that , you do have to realize these are ANTIQUE or VINTAGE paintings.
This is one of the main reasons why so many people would like to have an aged oil painting than a newer one.You can use a thick paintbrush to add the first coating to your painting.This will be the colour that comes once the painting is aged and cracked at the same time.Determining the value of an oil painting can only be done by a professional in this field.It’s hard to determine the age of an oil painting along with its value especially now that there are lots of new technology that are available for determining various things that may seem to be impossible to know.