Any galvanized metal repair requires bondo ultimate.
Bondo vs sheet metal.
1 bodywork including filler bondo 2 paint prep solvent 3 self etch primer 4 high build primer 5 basecoat 6 clearcoat.
When the magnet lets go the reading of the barrel body at the edge of the metal sleeve is the paint and bondo thickness in mils.
Original steel bodies were easier to find and reproduction bodies were still a novelty.
A few decades ago this wouldn t have been an issue among street rodders.
Now that the metal has a bonded resin coating the vinyl ester will stick much better to the epoxy than the steel especially if the epoxy hasn t totally cured 7 days or so.
The instructions say it can be painted without any further treatment.
Try both methods metal filler primer vs.
Fiberglass versus steel bodies.
Panel bond is made to adhere to bare metal sometimes i will still spray it with epoxy primer first and sometimes not depending on a lot of variables with the job.
Put magnetic tip of gauge against sheet metal.
Car bodies are very rigid structures that don t have much if any expansion and contraction due to weather conditions.
Slowly and steadily pull the metal sleeve away from the sheet metal.
Like i mentioned before auto body filler is meant to behave much the same way as the metal chassis it is used to repair.
Spread it out with a bondo spreader like you were laying mud allow it to dry and then remove the tape from opposite side and sand.
An example of the application order on bare metal is.
My sheet metal has been through my molasses bath washed with water then spayed with a phosphate type rust converter and is now a nice shade of black.
Not only does it adhere to galvanized metals but it is easy to mix easy to apply and provides for clog free sanding.
My car is complete however i am curious to know what you guys opinion of using bondo versus allmetal for body work like replacing sheet metal etc.
The bondo brand name was created in 1955 just a few years after the use of lead body solder began to be prohibited.
So my plan is prime with a 2pack primer bondo bog it reprime then paint with lacquer.
If you are bored one day do a test patch on some scrap sheet metal.
Bondo ultimate can be applied directly over sanded and cured primer and paint.
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Accordingly bondo is a very stiff product when cured which makes it well designed for auto bodies.