When to Add Body Filler and Metal Filler????

RTR · Dec 8, 2012

I have had a few peices sandblasted an they are ready for the primer. A couple peices need some body filler to smooth out and I am going to use some JB weld on the rims to fill in some pitting.

My question is......should I prime all peices first then do the body filler or should I do he body filler before I prime. ?? What is the common practice for that?

JRSutton · Dec 10, 2012

I'm not sure there's a right answer, I've heard arguments either way.

I usually do a little of both.

For big areas I apply filler directly to metal.

Then I prime, so it's easier to see defects.

Then I go back and fill those.

My logic (which may be flawed) is that I typically use epoxy primer which isn't really meant to be sanded (it can gum up the sanding pads). So if it's a big area that needs lots of sanding, I prefer to do it without worrying about the primer.

When I do prime, all that's left is little spots that dont require any agressive sanding.

I'll primer one more time to get a uniform finish. Then use surfacer and work out the real tiny defects with that.

When to Add Body Filler and Metal Filler????

RTR

Well-known Member

JRSutton

Well-known Member

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