Scratch Building -  Painting Brass

The basics of painting Brass

Painting brass can be a difficult task for some but is made much easier with a sand blasting booth.

The problem is that BRASS oxidizes and prevents the paint from making a good grip on the surface of the metal. In the past special etch primers have been tried and even these still allow the paint to chip relatively easily.

With the sand blaster all the brass parts that need to be painted are suitably sand blasted prior to applying the etch primer and paint. The sand blasting just roughens up the surface sufficiently that is gives an excellent key to the paint without any other preparation other than a light blast of air to clear away any remaining particles of grit from the blasting process.

An etch primer that has been found to be successful is "Craftmaster Aerosol Etching Primer" and this can be found on the web site of Craftmaster Paints - whilst not cheap it says to apply thinly as possible in one coat so a can goes a long way!

HOWEVER most brass that is to be painted will also have needed to be soft soldered to another piece to make up say a cab of a loco  or body of a truck.

SOLDERING and sand blasting do not mix. Always solder first and then sand blast else it is as near as impossible to solder a good joint. Even more difficult if you have used a special etch paint such as mentioned above as the paint will not even burn off with a pencil flame torch being a water based paint.

That is enough for here but more on soldering brass in another section.


Read all the safety information before you try sand blasting as we cannot be held responsible for miss use.