The answer to this question depends on the type of paint you are using and the condition of the surface you are painting. If you are using a water-based paint, it is not necessary to strip the paint before painting. However, if you are using an oil-based paint, it is advisable to strip the paint before painting. This will ensure that the new paint adheres properly to the surface. Additionally, if the surface you are painting is in poor condition, stripping the paint may be necessary in order to achieve a smooth and even finish.