How to clean a spray gun properly

Larger surfaces can be painted in a particularly time-saving manner with paint sprayers such as spray guns. However, when planning projects, it should not be forgotten that some devices of this type have to be cleaned relatively laboriously.

Why is correct cleaning so important?

If brushes or paint rollers are not cleaned properly, they have to be disposed of in the worst case and replaced by a new purchase. However, spray guns and paint spray guns are much more expensive than ordinary paint brushes. Even replaceable nozzles can be relatively expensive and should therefore be looked after with the appropriate care.

If this care is neglected, this can sometimes be noticed very quickly in the spray pattern: a paint nozzle that is partially blocked by old paint residues can result in a fluttering spray pattern. Sometimes, however, the paint drips down unattractively from the paint nozzle in such cases.

How to clean a spray gun properly

Spray guns cannot simply be cleaned with water due to the solvents used in the paints. Rather, for correct cleaning, the following work steps should be carried out as soon as the actual spraying is finished:

  • First, nitro solution or a similar cleaning agent is poured into the gravity feed cup
  • this cleaning agent is sprayed through the nozzle onto an old newspaper or cardboard
  • Parts such as the paint needle and nozzles are carefully dismantled
  • the paint channel is cleaned and rinsed with suitable cleaning brushes
  • then the spray gun can be blown dry with compressed air
  • Depending on the model, the paint needle is carefully dried with a cloth and then greased
  • Finally, all removable parts are reassembled (as soon as they are dry)

This is how a spray gun for emulsion paints is cleaned

If paint spray guns with solvent-based paints are used, then solvent-based cleaners are also required for cleaning. However, no aggressive cleaning agents (e.g. acetone) should be used, as these agents could attack the sensitive seals in such a device.

If water-soluble emulsion paints have been sprayed, the device can first be cleaned with tap water (which is sprayed through). Then the various sieves and filters of the device should be rinsed separately and freed from paint residues. Depending on the manufacturer and device type, this can be differently complex.

If it is a loan device from a hardware store, the question of the correct cleaning for the specific case is optimally clarified with the specialists on site when the device is picked up. Otherwise, in the worst case, there could be difficulties with the repayment of the deposit.