What is the different between sealer and primer surfacer? How to use them?

Sealer and Primer Surfacer are both used in the process of preparing a car's surfacefor paint. While they serve similar purposes, there are some key differences betweenthe two.
Sealer:
Sealer is a clear or colored coating that is applied over a car's surface to help thepaint adhere more effectively.

Sealer helps to create a smooth and even surface for the Topcoat of paint, and italso helps to prevent the underlying paint layers from bleeding through.Sealer is typically applied after the bodywork has been completed and any
imperfections have been corrected.
Sealer is usually applied in a single layer, and it should be allowed to dry
completely before the topcoat of paint is applied.

Primer surfacer:
Primer surfacer is a type of primer that is used to fill in small imperfections andcreate a smooth surface for the topcoat of paint.
Primer surfacer is applied after any necessary bodywork has been completed and
any rust or corrosion has been removed.
Primer surfacer is usually applied in multiple layers, with each layer being sandecdown to create an even and smooth surface.
Primer surfacer can be applied in different Colors, depending on the color of the
topcoat of paint that will be applied.
How to use them:
Sealer is typically applied after any bodywork has been completed and before thetopcoat of paint is applied. lt should be applied in a single layer using a paint gunor spray can, and it should be allowed to dry completely before the topcoat isapplied.
Primer surfacer is applied after any necessary bodywork has been completed ancafter any rust or corrosion has been removed. lt is applied in multiple layers, witheach layer being sanded down to create a smooth and even surface. Primersurfacer can be applied using a paint gun or spray can.

lt's important to note that the specific steps and techniques for using sealer andprimer surfacer may vary depending on the manufacturer's instructions and thespecific product being used. lt's always a good idea to carefully read and follow thema