8 replies to this topic

[HUBBA.HUBBA]

What do people use. My angle grinder with a grinding disc is a bit harsh. What should I use for a nicer finish? I've done a search for linishing discs but don't know what is correct and/or if they are sanding flaps?

[sonikk4]

Now personally i knock the welds back with a grinding disc or cutting disc depending on where the weld is situated. I then finish off with Roloc discs.

http://www.3mdirect....AQ&gclsrc=aw.ds

 

Some people use flapper discs but you need to be careful with these as its very easy to thin the metal.

http://www.3mdirect....AQ&gclsrc=aw.ds

 

Awkward corners i use Carbide rotary burrs

http://www.banggood....yL5MaAt8-8P8HAQ

 

Other peeps use belt sanders like this

http://www.thoritedi...DmPoaAoAA8P8HAQ

[HUBBA.HUBBA]

Cheers for that. What do the Roloc discs attach to and what grade do you use?

[Carlos W]

I use flap discs, just take your time, heat is the enemy

[sonikk4]

Roloc disc holder

https://www.cromwell...uk0saAp1g8P8HAQ

 

i use 36 grit discs to polish the weld flush and then on exterior panels 60 or 80 grit to finish off. 

[Davey3legs]

Flap discs just ordered loads for my next project.

[R1mini]

I rarely bother finishing anything, unless it's needed for painting in a place that is on show

[Tommyboy12]

I rarely bother finishing anything, unless it's needed for painting in a place that is on show

Agreed. I only dress welds on the shiney side. I didn't dressed my floor pan or sill repair.

Edited by Tommyboy12, 30 April 2016 - 02:02 PM.

[The Otter]

If I can get to them easy I'll use a grinder with a flap disc to get them most of the way there then finish off with my B&D Powerfile, or if it's an awkward spot I might use a carbide burr and/or the Powerfile. I've used the Powerfile loads on the recent lot of welding on my car and found it to be very useful and gentle/precise enough to not end up grinding away too much metal.

 

Edit: as others have said, I wouldn't bother getting structural/hidden welds flush as you're only taking off more metal and potentially weakening things, but I always get them 90% ground down so there's no big obvious bits bulging out.

Edited by The Otter, 30 April 2016 - 04:48 PM.