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Using the hot air plastic welder lay down a strip of R02-03-03-NT Polypropylene. Aim the flow of air at the intersection of the rod and the plastic that you are welding. Be sure to melt both the rod AND the existing plastic. After laying down some plastic, melt away the excess rod with the side of the welding tip.
If you are using a nitrogen welder (which gives a stronger weld), go ahead and switch back to air. (This will help you conserve your nitrogen.) Otherwise, go to the next step.
Use the airless welder to smooth out any curled edges that often occur while welding.
Allow time for the plastic to cool before removing the tape. Then, use a die grinder and Part No. 6122 cutting burr to remove some of the existing plastic. This will prevent the plastic from being too thick when the new material is added.
If you are using a nitrogen welder (which gives a stronger weld), go ahead and switch over to nitrogen.
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