Welding burn thru

More of an art than a science - discuss metalworking and welding here.



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PostPosted: Sat Apr 30, 2022 10:47 am
[quote="jimmystoys"] Although I will remove all the original paint eventually and spray with epoxy, could I at least treat the patch with epoxy so I could apply some filler? I understand it's better to epoxy the metal to minimize flash rust then apply the filler after. The backside I will clean up and treat right away with epoxy.

Just wondering if anyone had a thought to my query?



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PostPosted: Tue May 03, 2022 8:27 am
I don't understand the question ?

I have applied filler over both metal covered in epoxy and just filler over bare metal both are considered acceptable BUT any more I think doing Filler over epoxy is best.

I have Seen many instances over the years were filler was just applied over bare metal and when the filler is removed many years later the metal is rusty under filler.
Dennis Barnett
A&P Mechanic, FCC General radio Telephone Operator
Line Maintenance A&P Mechanic and MOC Tech specialist.



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PostPosted: Tue May 03, 2022 10:42 pm
Doright wrote:I don't understand the question ?

I have applied filler over both metal covered in epoxy and just filler over bare metal both are considered acceptable BUT any more I think doing Filler over epoxy is best.

I have Seen many instances over the years were filler was just applied over bare metal and when the filler is removed many years later the metal is rusty under filler.


My query/question was that I wanted to replace metal in areas then epoxy and only then apply filler. My understanding is it's better to apply filler over epoxy other than metal because of what you described Dennis. You have answered my question. Thanks again!



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PostPosted: Fri May 06, 2022 10:06 am
After a couple coats of epoxy I let the Epoxy cure out a week or more Then I scuff the Epoxy b4 any Filler work. (Epoxy needs time to do its thing) you could do it sooner BUT....

I am a firm believer of letting the stuff fully cure out the longer the better It gets stronger as it cures. To really get its benefits of using it needs to fully cure out in my opinion before any thing goes on it no better Base to build upon.
Dennis Barnett
A&P Mechanic, FCC General radio Telephone Operator
Line Maintenance A&P Mechanic and MOC Tech specialist.



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PostPosted: Sat May 07, 2022 10:22 am
Doright wrote:After a couple coats of epoxy I let the Epoxy cure out a week or more Then I scuff the Epoxy b4 any Filler work. (Epoxy needs time to do its thing) you could do it sooner BUT....

I am a firm believer of letting the stuff fully cure out the longer the better It gets stronger as it cures. To really get its benefits of using it needs to fully cure out in my opinion before any thing goes on it no better Base to build upon.

Got it. Thx!
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