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Brazing Pinholes in Boot Floor

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1965_MGB

1965_MGB

Jedi Warrior
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I have been very busy for most of the day, trying to get all the paint and rust out of my boot floor, and I have discovered a couple of small pinholes.

I don't have a welder, or torches, but today while at Lowe's I saw a set of two small propane like tanks that have MAPP gas and propane in them, along with hoses and a torch tip.

I was wondering if anyone out there has used this setup to braze some small holes. I am also hoping to fill some pits in the floor to make it look at least a bit more level before I use some POR-15 on it.

Any thoughts are appreciated.
 
Although I have tried the small propane bottle for brazing {with Brass} I can tell you this ..... It won`t work! {doesn`t get hot enough} I have never tried the mapp gas in the small bottles that you can get at most hardware stores. I know it does get hotter and may work with the turbo torch that you can get for those small bottles of propane and mapp gas. One thing to consider is Silver Solder, it does have a lower melting point, Lead would also be a good alternative for encapsulating pinholes. Lead could be applied with the plain ole propane torch no problem. {If you can find lead solder, anymore it is getting harder and harder to come by.}
As with any Welding/Soldering/Brazing process, a well ventilated area to work in is a MUST! The area to be repaired should be as clean as possible {both sides if possible}. Keep in mind what ever process you end up using, the flux must be thouroughly removed as it is very corrosive especialy over the long term.
Hope this helps
 
I did some brazing in college with an oxy-mapp setup I bought from sears.... $50-ish. Flux and cleanliness was the key, and I was able to get it to flow into a joint.
 
My experience with "small" rust pin holes is that once you get the metal really clean & apply heat, the hole gets much larger, & big sections need to be cut out & replaced.

I suggest that if this is just a patch job as opposed to really restoring things, use a cold patch method. Also if brazing is used as a first attempt It makes things nearly impossible to weld at a later time.
D
 
What Dave says is very true, welding over an area previously repaired with brass is nearly impossible until the brass is COMPLETELY removed!
 
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