backing for filling holes

General Discussion. Make yourself at home...read, ask and answer!

User avatar

Top Contributor
Posts: 2762
Joined: Sun Dec 16, 2012 4:46 am
Location: Canberra
Country:
Australia
PostPosted: Sun Jul 31, 2022 1:35 am
The problem with doing it that way, Dennis, is that you're only filling the small gaps between the infill piece and the original panel. As the metal expands and contracts there is not enough filler in that small gap to cope with the size changes, so it cracks.

Doing it Jay's way means you have a larger piece if filler in there which is less likely (not guaranteed) to crack around the edges. I've done a couple like this, at owner's request, and they've held up really well; one on a Nissan Patrol that went thousands of kilometres through the centre of Australia, over corrugated roads in in crazy high temperatures. When he came back, some 9 months later it looked just like it did when I did it.

The trick is to use really high quality panel adhesive and make sure it's on well cleaned surfaces.
Chris



Top Contributor
Posts: 6216
Joined: Tue Sep 16, 2008 1:17 pm
Location: Pahrump NV.
Country:
USA
PostPosted: Sun Jul 31, 2022 7:56 am
To each his own, I did a similar deal on my Plymouth rocker panel years ago and displayed it here on the board, you may remember it?
It still looks good to this day BUT I did clean the adhesive out of the gap then beveled the edges slightly then filled beveled gap with Fiberglass filler I did include that in my post, still a lot of experienced body guys frowned at my repair.


Ditto on using Hi quality Panel adhesives Not all are really good.
When they are used correctly they are a good alternative to welding for some repairs in my opinion.
Dennis B.
A&P Mechanic, FCC General radio Telephone Operator
Line Maintenance A&P Mechanic and MOC Tech specialist.



Top Contributor
Posts: 6735
Joined: Tue May 19, 2009 7:10 pm
Location: OREGON COAST
PostPosted: Sun Jul 31, 2022 12:48 pm
Doright wrote:To each his own, I did a similar deal on my Plymouth rocker panel years ago and displayed it here on the board, you may remember it?
It still looks good to this day BUT I did clean the adhesive out of the gap then beveled the edges slightly then filled beveled gap with Fiberglass filler I did include that in my post, still a lot of experienced body guys frowned at my repair.


Ditto on using Hi quality Panel adhesives Not all are really good.
When they are used correctly they are a good alternative to welding for some repairs in my opinion.

Dennis, :goodpost: sure its not the ideal fix, but its about all you can do when you don't have a welder and know how to use it on sheet metal. the shrinking edge is the problem.
Jay D.
they say my name is Jay



Non-Lurker
Posts: 7
Joined: Thu Jul 28, 2022 11:57 pm

Country:
USA
PostPosted: Mon Aug 01, 2022 1:21 am
I went with some copper pipe I had, cut it lengthwise then flattened and fit pieces into the holes with jb weld between and this getup holding it for a day:

Image

Seems to have held up nicely amid all the sanding that took place afterward:

Image

User avatar

Top Contributor
Posts: 2762
Joined: Sun Dec 16, 2012 4:46 am
Location: Canberra
Country:
Australia
PostPosted: Mon Aug 01, 2022 6:59 am
Yup, that'll do it...........................not.

'badsix wrote:Hill Billy way

...and now you have two. :rotfl:

Might be fun to run a book on how long this lasts and whether the paint over JB weld will fail before the compromised paint not removed.
Chris



Top Contributor
Posts: 6216
Joined: Tue Sep 16, 2008 1:17 pm
Location: Pahrump NV.
Country:
USA
PostPosted: Tue Aug 02, 2022 12:52 pm
NFT5 wrote:Yup, that'll do it...........................not.

'badsix wrote:Hill Billy way

...and now you have two. :rotfl:

Might be fun to run a book on how long this lasts and whether the paint over JB weld will fail before the compromised paint not removed.



Can I get in on that action? :rotfl:
Dennis B.
A&P Mechanic, FCC General radio Telephone Operator
Line Maintenance A&P Mechanic and MOC Tech specialist.
Previous

Return to Body and Paint

Who is online

Users browsing this forum: badsix, Google [Bot], magee84 and 138 guests