Am I allowed to weld over paint? Or do I have to remove it? What about primers and paints that claim to be “weldable”?

The breathing zone of welding personnel may contain fumes from a combination of base and filler metals as well as surface coatings including paint in some cases.  All of these ingredients mix in the heat of the weld puddle with air-borne particulate forming the fume that can be seen as a plume rising from the weld area.

The information provided is intended for general interest, to educate and inform our audience. The CWB and those providing feedback to the questions do not take any responsibility for any omissions or misstatements that could lead to incorrect applications or possible solutions that industry may be facing.

How-It Works content is submitted by Industry experts to the CWB Association and does not necessarily reflect the views of the CWB Group. When testing for CWB Certification or CWB Education, please refer to CWB Education textbooks or CSA standards as the official source of information.