Proper Procedures ??

[72Charger72]

New to doing body work and I will you tube some things but I decided to replace the floorpans on the 72 I am working working...this knocks out alot of work and rust..
I think I am going to clean up the frame with 3M™ SandBlaster™ Clean-N-Strip Discs 9681, 4.5 inch, Medium grit, 54767
What are the proper procedures for the underside and engine compartment. to clean then seal and paint?
Obviously sand off the rust but then what? I am thinking of using the raptor products for the undercoating? Do you just sandand cleanup and then immediately
undercoat before more rust starts up? I saw some products listed for stopping rust like in the inside frame areas and such from Eastwood?
Thanks for any help!

[DREDILSKI]

 

[Dreamcar]

I'll be starting the underside of my car soon. Mine needs some new floor sections too, but the rails are good with just some light surface rust. Here's what I plan on doing.

I've spend hours researching different paint-over-rust type materials to save myself from blasting the underside. Basically, my research has led me to get some "Chassis Saver" from Magnet paints. Apparently, this stuff works best over some light rust because it uses the rust as a bonding agent. Some degreasing and a pass with wire brush to remove any loose rust is basically all the prep necessary (read the instructions though). Rust free sanded bare metal can be coated too. 

What has sold me on this product is that I contacted the company for some info and I told them that I want to be able to topcoat the surface with a rubberized undercoating for a "textured" look. They said that if I use their shiny/glossy version of Chassis Saver, then give it a good scuff, the undercoating should stick with no issues. This is a plus for me because I want to seal the bottom with Chassis Saver, then have the car painted, then go back and add the undercoating that will also hide any overspray from the paint job. The topcoating of other paint-over-rust products seemed questionable based on the product data that I could get, unlike the Chassis Saver.

When I have the floor pans rememoved, I'll coat the inside of the rails with more CS, and use some Eastwood internal frame coating for any areas I can reach with the CS.

just my  ...I hope my plan goes well.

[ottawamerc]

Hey Dreamcar. FYI I also was sold on the Chassis saver and sprayed $$$$ of dollars of the stuff into my car while it was apart and this year when I pulled the carpet guess what I found??? Yeppers RUST! May not be "as" good as advertised.

Scott

[Dreamcar]

Ooh.....good to know. Any suggestions?

[six-tee-nine]

rust and bubbles under the old paint = sand blast
clean old paint = coarse sand paper or wire wheel cleaning

Then epoxy primer asap

I always want to put epoxy primer the same day / evening over spots I sand blast.

buy a hand held sand blaster and a paint gun for primer. The best investment you'll do for bodywork.

[Patronus]

Sometimes spraying a product like that isn't the best application. I would recommend brushing it into the part(s)

[Dreamcar]

Im also considering the rust bullet undercarriage kit. Either way, im brushing.

[Patronus]

A foam brush works good if your anti brush strokes. I usually brush it on and then back roll with a small throw-away roller from HDepot. Best $1.97 you can spend.

[Dreamcar]

Thanks for the advice. I'm not too worried about brush strokes because after the car gets painted, i'm scuffing the underside and spraing rubberized undercoat.

[72Charger72]

So Ive decided on the Eastwood products...but Im sanding with the 3M wheels first....then using Eastwood rust encapsulator then using Raptor tintable for the under
side and trunk etc...also using Eastwood Frame Sealer for the inside....BUT I also bought a small soda gun for hitting the tough stuff with...
I am thinking if theres rust I want it gone as much as possible

[72Charger72]

as I am new and reading and learning... trying to figure out which way is best....
I am looking at replacing my inner fenders walls....then sanding the whole engine compartment,rails  and firewall...this will be a slow resto as I dont get much time...
after sanding an area to metal should I protect it with epoxy primer? It will be quite awhile before I get to the painting stages and I just want to protect the
rust removal work as I go?

[Dreamcar]

as I am new and reading and learning... trying to figure out which way is best....
I am looking at replacing my inner fenders walls....then sanding the whole engine compartment,rails  and firewall...this will be a slow resto as I dont get much time...
after sanding an area to metal should I protect it with epoxy primer? It will be quite awhile before I get to the painting stages and I just want to protect the
rust removal work as I go?

Absolutely...the sooner you protect bare metal with epoxy the better.

[six-tee-nine]

Yes you should asap.

Depends on the climate. but in winter time I can get surface rust on bare metal over night.

I always put epoxy primer on every bare metal part that is cleaned withing 24 hrs. I then let it sit overnight before putting a coat of high build primer on it.
I do that so I dont have to scuff the epoxy wich you need to do If you wait till the epoxy hardens out complete

[72Charger72]

Thanks guys thats what I wondering because Im reading everywhere the base is most important part and I want to make sure
I get that right and dont waste time re-doing a bunch of work because I have to move slow on this...
So sand/grind remove rust...then epoxy primer asap then base primer the next day?

[Dreamcar]

Yes, that seems correct to me. Follow the tech sheets. Your epoxy will have a window for topcoating without having to scuff. The SPI i'm using is 7 days, but i would never go that long without scuffing or reapplying to reactivate the window.

[72Charger72]

on the sanding grinding rust removal I was also going to use Eastwood rust converter primer stuff for micro rust I cant remove...
do you think that is ok to go under the epoxy primer?

[Dreamcar]

on the sanding grinding rust removal I was also going to use Eastwood rust converter primer stuff for micro rust I cant remove...
do you think that is ok to go under the epoxy primer?

Be very carefull with that stuff....some epoxy can, some not. SPI allows for the use of OSPHO but with a strict procedure. Contact Eastwood before doing anything.

[72Charger72]

Eastwood says you can use their Epoxy primer over the Rust Converter....good to know their products are compatible haha

[72Charger72]

What kind of primer should you use over the epoxy primer? A self Etching primer? still learning 101 stuff I guess....but there seems to be so many ways and
techniques for doing it?

[Dreamcar]

If eastwood says its fine, at least you know.

You want to use their high build primer after the epoxy. Self etch is old school and used instead of epoxy. Epoxy is better for slow restorations. Get a high build that is a different color than the epoxy and use guidecoat before sanding.

[Dreamcar]

High build = primer surfacer

[72Charger72]

Thanks Dreamcar! I think have a procedure to follow .....now for some forward progress!

[Dreamcar]

No problem. Keep us posted. Are you doing filler work too? Ask Eastwood if their rust converter will hurt filler.

[72Charger72]

As I move from the engine compartment to the body I will have a small area that needs filler but there is no rust in that area....
I will post some photos as I go...I have a build post under
http://www.dodgecharger.com/forum/index.php/topic,109796.msg1352790.html#msg1352790