Seam Sealer Burning Off

[Championship White]

Seam welding a car body and it seems that there is seam sealer between the panels which have been spot welded together from the factory, this is causing the welds to spatter and volcano. Has anyone had a similar experience and what did they do?

 

[bpcoryton]

when ive done shells in the past all i did was heat up each section to be stiched welded with oxy&da useing welding nozzle and while still hot use a wire brush to get as much of the sealer out as possible,then tap the seam together,then weld it.its not hard!!