welding plastic

[NCangler]

From the factory:

Sand the area starting with either 200 or 500 grit sandpaper (depending on how much material needs to be removed). Then work your way up to 800 grit. Use a paper that does not have any dies in it (for example don't use the yellowish brown paper, as it will leave residue behind). After 800 grit buff with a high speed buffer and a dry lambs wool buffing pad, being careful not to "burn" the surface by buffing in one area too long.

[dscar4u]

Can i use the powder to heat and mix into the scratches. i have seen a little baout this and wondered if it would be better than welding since they are so shallow.

Thanks

[HighTechRedneck]

sand with a fine grit sand paper and use a high speed polisher with lambs wool to bring back the shine. GO EASY with the polisher or it will dig into the hull..

good luck

[NCangler]

I think you'd have better results with the welding rod material. The powder is great for reseating screws with the "hot dip" method.

[SubmersibleGeek]

I just bought a plastic welder from Harbor freight and it is a mode that doesn't need a compressor. Ii supplies its own air. It was $20 more than the one you need a compressor for but I thought it was worth it. I can now do repairs at the marina. I will probably use it for the first time next weekend and will let all know how it does.

Does anyone know what temperature Roplene melts at? This new welder comes with a chart for setting the rheostat to achieve specific temperatures depending on the material you are using.

[pamarine]

HDPE melts around 350-400 degrees.