First and foremost thing you should consider before trusting any oil painting method is that it must come with disclaimer. More than any other types of do-it-yourself process, oil painting cleaning must actually be trusted to professional conservators. On the other hand, if your painting does not carry expensive tag, or it is not really old, or not too critical, there are few options to make it look cleaner and brighter yourself. In addition, modifying true antiques in fact decreases their value, whether they look better to you or not.