[57fordft]

My 57 ford has been with me for a long time and am now ready to start finishing it, I have done bodywork over the years with different primers over it , what kind of aprimer should I cover all this with ??

[swvalcon]

If it where me I would sand the whole car real good if the intent is to give it a complete paint and prime it with a couple good coats of spi epoxy.

[39Hemi]

The durability of the final paint job can only be as good as the worst component. If you have a variety of non-epoxy primers currently on the car they should all be sanded off since non-epoxies do not seal out moisture and you could have rust forming under the primer. If you have used any acid etch primers in the past those should be sanded off as well since they are not compatible with epoxy.
If you have not figured it out yet the primer your should use is an epoxy, and as mentioned in the previous post SPI has a very good product that is cost effective and easier to work with than the big brand names. The adhesion of epoxy to metal is excellent and it provides a moisture barrier so if the topcoat gets chipped you do not have a path for rust to form.
Personally I use the epoxy under the body filler for that reason since the filler will absorb moisture, but I'm not suggesting you redo all the body work, people have gotten excellent results with epoxy under or over the filler. A good epoxy primer is the best foundation for a quality paint job.

[CQNRQY]

Originally Posted by 57fordft

My 57 ford has been with me for a long time and am now ready to start finishing it, I have done bodywork over the years with different primers over it , what kind of aprimer should I cover all this with ??

I have to agree... i d use an apoxy primer after a complete sanding of your car... apoxy is a great sealer against moisture and will give you a good base to build on with fillers or your final paint

[swvalcon]

IF YOU TAKE YOUR PRIMER DOWN AS BEST YOU CAN WITH BLOCK SANDING THE FACT THAT ITS OLD PRIMER SHOULD NOT BE A ISSUE. You'll get people that wil say it all has to come off don't buy it. Yes it's not as good as what you can buy today but for years we used it because that's all we had. Every custom paint job in the country was done with it and some looked pretty good to. I did ton's of jobs back in the day with lacquer primer and had lots go 5-10 yrs . How long will you own the car or in 10 years will you want it a different color anyway. If that's the case the primer on a car that only gets used a few month out of the year isn't that big of a deal.Just seal it with epoxy and let her fly.