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What is the best way to prep surface rust for primer?

Fill a fender antenna hole?

Best primer for a rig kept outdoors?

Thanks in advance, I know a lot of you are really good at this sort of thing. Looking forward to getting schooled

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"If we did the things we are capable of, we would astound ourselves" - Thomas Edison

I would sand off the rust and hit it with a good primer.My brother used a epoxy on his camaro high dollar but it turned out great.There are a lot of books magazines and websites with body work tips and tricks read a lot of them and go outside and give it a shot.Good thing about bodywork is if it goes bad you can sand it back down,repaint it ,or cover it with bondo and primer.GOOD LUCK AND BE PATIENCE!!!!

Epoxy primer is now made in a spray can just like spray paint. This should be available at any local paint supply store.

Any primer will eventually have rust come back if kept outside and allowed to ge wet. If it is small spots in primer I would put paint over it to help seal it until you can get the whole thing painted.
If you have bare metal anything larger than a quarter in size use a self etching primer first then the epoxy primerover it.
As for as the hole weld in sheet metal. If you can't then get the fender off and clean the underside really good down to bare metal and fiberglass under the hole at least 2 to 3 inches past the hole. Seal it real good with paint and undercoating.
Use bondo over the top of the fender.
be patient and go slow.

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Too much to do and not enough time or money!
Courage is the other side of fear!
Pain is the weakness leaving the body!

all the holes in metal need to be welded up first like the antenna hole and they make a type of acid stuff that you can get at your local paint shop that will cover bad cancer try to sand it first and if it is still bad get the acid stuff and always use good primer i have done it both way one is the right way and then the rong way take your time and ask all the ? you need

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http://www.facebook.com/ez.cracker
dangerous-toys4life
73 3-door avalanche bdydropped on 18s
86 1-ton 4x crewcab short bd 15"lift
75 k-5 2x
94 king cab

What about Fusor? It's metal adhesive, used on lots of newer cars. I was thinking of trying to fill the antenna hole, as outlined above, but using a piece of thin sheetmetal and the Fusor to attach it.

I hope to be moving the truck indoors in the next couple of weeks, but my garage is just that. It's not exactly air tight, and it's pretty damp here most of the winter. Is this etch stuff a pre-primer then? There really isn't any bad rust on the '75 and there has been some pretty decent body work done that I don't want to try to redo. It needs to be covered/indoors so I don't waste what has already been done. There are quite a few spots right now with exposed primer, and I know if it sits outside unprotected that it will get all spongy and swell.

I may just hit the whole truck with a spray bomb rattle can job, just to cover up what's there. I'd like to hit the surface rust spots now though, so all I'll need to do later is rough sand it and start rolling on my paint.

Thanks for your comments on this. I've read A LOT about doing this sort of thing, but the books and experience are two very different things. The most I've ever done was small fender edges and such, and I have to say, I didn't do a very good job.

_________________
"If we did the things we are capable of, we would astound ourselves" - Thomas Edison

A lot of body shops now are using panel adhesive for puttin in new panels instead of welding. Comes in tubes and is really strong stuff. 3M makes and excellent adhesive. once together I guarentee you can't get it apart with out cutting or chiseling.
You could try it and dent the hole in a bit for filling over the metal patch.
I worked in an auto body supply shop and we sold a bunch to body shops.
Just remember no primer is a sealer for weather and any bondo will draw moisture

_________________
Too much to do and not enough time or money!
Courage is the other side of fear!
Pain is the weakness leaving the body!

So what do I do about the bondo on the truck that has gotten wet? If I get the truck out of the weather and give it weeks/months to dry out, can I still use it? My limited experience has been that the first 1/16" or so gets soft, but underneath it's usually still ok...

_________________
"If we did the things we are capable of, we would astound ourselves" - Thomas Edison

can you get sum pics most of the time let it dry for a few days then sand it down and it will be ok but the pics will help ok

_________________
http://www.facebook.com/ez.cracker
dangerous-toys4life
73 3-door avalanche bdydropped on 18s
86 1-ton 4x crewcab short bd 15"lift
75 k-5 2x
94 king cab