Inner fender rust

After reading this again I would Return the surfacer, it doesn't fill very good and you don’t want that on the entire engine compartment. Use filler instead. Filler comes in a container with a tube of hardener. You mix it up and then apply it with a spreader where it is needed, not the whole project.

I would recommend DP epoxy primer mixed as a sealer. Reasons being that it goes on thin, covers well at a thin applications, and provides an excellent base for the color topcoat with minimal coats to cover. It doesn’t “build” thickness like the surface.

To mix it as a sealer you add more reducer. It goes on thinner and leaves a smoother surface. It doesn’t need to be sanded, but you can sand any areas that need more attention.

A person shouldn’t be applying these products under 60 degrees, it just has potential for more problems.

Either way I'm sure your fine in what you decide. This is a small touch up job and you aren't even doing any real repair. You just want to smooth out the rough pitted texture on the inder fender and protect it. It really depends on what you want to do. You have two options. Epoxy and filler or the sealer surfacer. For your small job I think your fine with the sealer although other some might disagree and prefer epoxy. Epoxy is "bulletproof" against the elements, that's it's main claim to fame.

Also, on a practical note, where are you gonna be shooting this and doing the body work?

Hahaha, this is the whole reason I didn’t want to tackle this project. Everyone I ask has a different opinion. I like doing things that are cut and dry. Building engines for instance. You torque it to a certain value. It is what it is. This isn’t going to be a show car. I don’t plan on painting the body. My son can paint it in 30 years when he gets the car if he wants. I just want to thrash on this car, but want a decent looking engine bay since the previous owner rattle caned it. I will be spraying this in a two car garage with a 60 gallon compressor and two harbor freight guns. One for primer with a 1.8 tip and one for paint with a 1.4 tip.

Slantscamp said:

Hahaha, this is the whole reason I didn’t want to tackle this project. Everyone I ask has a different opinion. I like doing things that are cut and dry. Building engines for instance. You torque it to a certain value. It is what it is. This isn’t going to be a show car. I don’t plan on painting the body. My son can paint it in 30 years when he gets the car if he wants. I just want to thrash on this car, but want a decent looking engine bay since the previous owner rattle caned it. I will be spraying this in a two car garage with a 60 gallon compressor and two harbor freight guns. One for primer with a 1.8 tip and one for paint with a 1.4 tip.

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Your fine with the primer surfacer just go easy, give it maybe 15% or so of the reducer to thin it a little so it doesn't build up to thick, to quickly, where you don't want it to. Make sure you wait in between each coat a few minutes at least for it to flash off. Feather it out, and build up the pitted area a little, make sure to do it in coats tho or it will run and drip. And let if flash off! Same goes for your top coat ;)

If it is not a big deal for you to return the primer and you can do that relatively easily--- then epoxy might be "better" and more appropriate for this repair and worth investing in... But not really by much, what you have already should last years and look good and provide adequate protection under your topcoat. It's really up to you to decide. You've gotten some good advice from everyone who's responded. At the end of the day primer is primer, paint is paint, it just depends on the preferences of the painter and what they are trying to achieve.

I do this in a ventilated garage as well ;)
Even in my driveway if the weather is good

Hi guys. So I returned the surfacer and got the epoxy. My father in law came over and gave me a hand mixing it and setting up the guns. But let me shoot it. It’s not to bad for a rookie. I’m happy with the results. Thanks for all the help and putting up with my questions.

Looks great.
B5?

Yup, b5 exterior with b7 interior

B5 is the best color Ma ever produced.

nice work looks good to me