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RLFD213 Samba Member
Joined: January 21, 2009 Posts: 325
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Posted: Sun Jul 05, 2015 4:56 pm Post subject: Grinding the welds smooth |
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So I have checked the forums and you tube but still can't get my welds to grind smooth so I can finish. What I do is grind the weld down with a grinding wheel and then use the green 36 grit rolac disc to finish but it still doesn't look like it's done. Any other tips or videos. Thanks |
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A Avina Samba Member
Joined: March 31, 2007 Posts: 274 Location: SantaAna Calif
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Posted: Sun Jul 05, 2015 5:38 pm Post subject: |
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Have you tried a bandfile belt sander?I have used one with success to work welds down. You can get one for a reasonable price from Harbor freight. |
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theKbStockpiler Samba Member
Joined: July 07, 2012 Posts: 2316 Location: Rust Belt
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Posted: Mon Jul 06, 2015 12:11 pm Post subject: |
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Cut off discs are made from finer stones than grinding discs. Anything milder than a rotoloc disc is not going to achieve anything is it? _________________ My beetle is not competing with your beetle. I have the yellow beetle in my town. There is a red one, a green one ......
Use all safety devices including a mask. |
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marklee Samba Member
Joined: March 24, 2009 Posts: 821 Location: Flintshire, North Wales
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Posted: Mon Jul 06, 2015 2:37 pm Post subject: |
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I use these on an angle grinder
https://www.machinemart.co.uk/shop/product/details...tAodfGQMYA _________________ CGLI qualified body repair and refinish tech
CGLI qualified motor repair tech
Qualified automotive Glass installer
Motor Insurance Repair and Research Centre,Thatcham, Advanced Vehicle Damage Estimator.
Police qualified vehicle examiner
Police Class 1 High performance, pursuit trained Advanced driver |
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buguy Samba Member
Joined: November 17, 2003 Posts: 4915 Location: Port Orange, FL
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Posted: Tue Jul 07, 2015 8:10 pm Post subject: |
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36 grit roloc should be just fine. Clean it with some wax and grease remover and skim it with some fiberglass reinforced filler. Bondo/primer as usual. |
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[email protected] Samba Member
Joined: June 02, 2011 Posts: 1593 Location: Louisville, ky
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Posted: Tue Jul 07, 2015 8:12 pm Post subject: |
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Yes, those flappy wheels on an angle grinder are awesome. |
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buguy Samba Member
Joined: November 17, 2003 Posts: 4915 Location: Port Orange, FL
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Posted: Tue Jul 07, 2015 8:17 pm Post subject: |
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Just be careful. Some of those flappy wheels will actually put a polish on the metal. You want it rough as shit so the filler will have a good mechanical bite on the surface. |
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O2COOLED Samba Member
Joined: May 22, 2007 Posts: 452 Location: Pac NW
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Posted: Sun Jul 19, 2015 2:30 am Post subject: |
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This may be the thread closest to my problem. Whoever did the welding of the pan for the PO of my Ghia left a lot of ugly weld drips in the underside. I would like to clean them out not as well as if it was on the body but decent enough so it won't be too obvious after spraying with undercoat or rust bullet coating. Would appreciate your suggestions. _________________ "Sometimes people forget they signed up to a HELP & SHARE Forum not a pissing contest"
"At my age time is too short to respond to people with short minds"
Current: '69 Ghia Coupe
VW History:'63 Bug;'70 Bug;'73 412;'83 Rabbit;'86 Golf;'76 Fat Chick; 67 Ghia Coupe; '70 Bug |
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RareAir Samba Member
Joined: May 11, 2002 Posts: 14576 Location: 18 miles North of the border
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Posted: Sun Jul 19, 2015 8:09 am Post subject: |
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O2COOLED wrote: |
Whoever did the welding of the pan for the PO of my Ghia left a lot of ugly weld drips in the underside. I would like to clean them out not as well as if it was on the body but decent enough so it won't be too obvious after spraying with undercoat or rust bullet coating. Would appreciate your suggestions. |
If you have a grinder, a 4-1/2 inch 36grit flap wheel works wonders. They're a little expensive ($4+ each) but they get the job done with top notch results |
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O2COOLED Samba Member
Joined: May 22, 2007 Posts: 452 Location: Pac NW
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Posted: Sun Jul 19, 2015 3:56 pm Post subject: |
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Great, yes I have a grinder and will check the 4-1/2 inch 36grit flap wheel. If I'm lucky I may even have it in my tool chest. Thanks RareAir! _________________ "Sometimes people forget they signed up to a HELP & SHARE Forum not a pissing contest"
"At my age time is too short to respond to people with short minds"
Current: '69 Ghia Coupe
VW History:'63 Bug;'70 Bug;'73 412;'83 Rabbit;'86 Golf;'76 Fat Chick; 67 Ghia Coupe; '70 Bug |
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theKbStockpiler Samba Member
Joined: July 07, 2012 Posts: 2316 Location: Rust Belt
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Posted: Sun Jul 19, 2015 4:17 pm Post subject: |
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I use a pneumatic 3' cut off tool or a Harbor Freight electric version for $25. The HF model is well worth the money but if you overload it, it trips a circuit breaker you can reset from the outside. You just have to get used to how much you make it work. _________________ My beetle is not competing with your beetle. I have the yellow beetle in my town. There is a red one, a green one ......
Use all safety devices including a mask. |
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O2COOLED Samba Member
Joined: May 22, 2007 Posts: 452 Location: Pac NW
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Posted: Mon Jul 20, 2015 2:06 am Post subject: |
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Good, thanks. I also have a cut off tool from HF. _________________ "Sometimes people forget they signed up to a HELP & SHARE Forum not a pissing contest"
"At my age time is too short to respond to people with short minds"
Current: '69 Ghia Coupe
VW History:'63 Bug;'70 Bug;'73 412;'83 Rabbit;'86 Golf;'76 Fat Chick; 67 Ghia Coupe; '70 Bug |
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