Graffiti removal techniques

It is best to clean graffiti as soon as possible so the paint doesn’t have time to absorb into the surface. It is worth it to keep paint or removal products on hand so that you can quickly paint over or remove the graffiti should it become necessary.
PAINTING OVER GRAFFITI

If a large portion of a property has been vandalized, it may be cheaper to simply repaint.  A $10 gallon of paint covers the average 100 sq. ft. garage door for an average cost of .10 a sq. ft. It will also give you the opportunity to change the paint to glossy enamel, which will resist future graffiti attacks better than a flat finish.  For added protection, an extra
gallon of the same type of paint will help ensure a quick and painless perfect match if graffiti returns.
Before painting, try to clean the surface of any dirt or grease.  Certain marker pens and indelible markers have the ability to absorb paint pigments. That’s what makes them permanent so use a special paint called a stain blocker.  Also, if the base color is light and the graffiti a dark color, use a stain blocker first.  This special type of paint prevents the darker paint from seeping through the fresh paint.

Oil or Latex Paint? Sealers?  Foam Brushes?

Oil base paint is tougher than latex.  Latex is cheaper and easier to clean up.  Though not recommended, oil base, can be applied at below freezing temperatures if needed.  Oil base takes
longer to dry, but can be used if light rain threatens.  Once the new paint is on, you might consider using a “sealer” or “protectorate.”  These types of products seal the small surface pores and prevent graffiti’s ability to adhere.  Once sealed, the new graffiti is easier to remove with less work. Some protectorate systems sacrifice a small amount of the sealer and need to be reapplied after the graffiti is removed. As a good insurance policy, buy some foam- type brushes.  If graffiti reappears, use the foam brushes and the new
paint will blend into the old with perfect results.
Then just toss the brushes away since they are inexpensive.