The right time to apply it is before sunbathing or going to the solarium. It is very easy to use: apply to the skin like a simple lotion and spread the product well with massaging movements.
As far as the amount is concerned, you should neither use too little nor too much. You have to use enough so that your skin is not irritated when you spread it and, of course, you don't overdo it with the product. Once the tanning accelerator is absorbed, you can look forward to tanning.
However, it should be noted that it is better to read the instructions for use of each product carefully before using it.