I need some clarification.
Thread Starter
|
Senior User
Joined: Mar 2003
Posts: 274
Likes: 0
From: SW Wyoming
I need some clarification.
Hi, all
It's been a while, work and some classes have been keeping me busy. I just bought a pressurized sandblaster and the aluminum-oxide media, I haven't gotten to try it out yet.
The clarification I need is the steps following sand blasting. These are the things I need to do, but I'm not sure of the order to do them:
-Use Jasco, Ospho or other prep product on bare metal
-Cover with enamel primer or Zero Rust or Por 15 (I know that this follows the Jasco)
-Weld any holes, cracks, patches and grind the welds clean
-Use body tools to straighten panels
-Use body filler to smooth everything out
-Cover with sandable primer and do finish sanding
-Cover with final primer and color and clear coat with wet sanding in between (primer, paint and clear from the same brand to ensure that they will work together)
-Anything else I skipped or forgot about?
This is the basic order that I understand things are done, but if I coat with primer and then weld, will I ruin the primer? What about pounding on the primer with body hammers? These steps have to come after sand blasting because you don't know what you'll find, right?
It's been a while, work and some classes have been keeping me busy. I just bought a pressurized sandblaster and the aluminum-oxide media, I haven't gotten to try it out yet.
The clarification I need is the steps following sand blasting. These are the things I need to do, but I'm not sure of the order to do them:
-Use Jasco, Ospho or other prep product on bare metal
-Cover with enamel primer or Zero Rust or Por 15 (I know that this follows the Jasco)
-Weld any holes, cracks, patches and grind the welds clean
-Use body tools to straighten panels
-Use body filler to smooth everything out
-Cover with sandable primer and do finish sanding
-Cover with final primer and color and clear coat with wet sanding in between (primer, paint and clear from the same brand to ensure that they will work together)
-Anything else I skipped or forgot about?
This is the basic order that I understand things are done, but if I coat with primer and then weld, will I ruin the primer? What about pounding on the primer with body hammers? These steps have to come after sand blasting because you don't know what you'll find, right?
Admom
Joined: Feb 2001
Posts: 9,414
Likes: 201
From: Silver Springs
I need some clarification.
Hey John - long time no hear!!
The order I did this in was -
Sandblast - I found working on the metal to be easier after blasting because I couldn't see all of the dents with the faded, falling off, rusted paint areas.
Next, weld, pound, beat & whatever.
Then do the Ospho (Jasco), etching primer, epoxy primer and bodyfiller.
Note: some put the bodyfiller on the bare metal, I've been doing ours over the epoxy.
Now you can proceed to the sandable primer, a final coat of epoxy, then the color.
The order I did this in was -
Sandblast - I found working on the metal to be easier after blasting because I couldn't see all of the dents with the faded, falling off, rusted paint areas.
Next, weld, pound, beat & whatever.
Then do the Ospho (Jasco), etching primer, epoxy primer and bodyfiller.
Note: some put the bodyfiller on the bare metal, I've been doing ours over the epoxy.
Now you can proceed to the sandable primer, a final coat of epoxy, then the color.
Elder User
Joined: Mar 2003
Posts: 999
Likes: 1
From: Willamette Valley Oregon
I need some clarification.
<CR>
I believe Carlene is correct. Epoxy on the bare metal, let the epoxy paint cure, scratch the epoxy with 80 grit, and then apply the filler (AKA bondo). The epoxy seals in any micro-rust and seals out any moisture. You can just apply the filler to the bare metal but by adding the epoxy, you are providing it next protection.
My order of doing things
1) Scrub with Dawn dishwashing soap and water
2) Degrease
3) Hammer and dolly work/panel replacement
4) Strip the worked area of any paint
5) Treat area with rust conversion/etching material (i.e. Rust Mort, etc)
6) Epoxy prime
7) Filler work
8) Polyester filler skim coat
9) 2K primer
10) Final paint
Note: some put the bodyfiller on the bare metal, I've been doing ours over the epoxy.
My order of doing things
1) Scrub with Dawn dishwashing soap and water
2) Degrease
3) Hammer and dolly work/panel replacement
4) Strip the worked area of any paint
5) Treat area with rust conversion/etching material (i.e. Rust Mort, etc)
6) Epoxy prime
7) Filler work
8) Polyester filler skim coat
9) 2K primer
10) Final paint
Thread Starter
|
Senior User
Joined: Mar 2003
Posts: 274
Likes: 0
From: SW Wyoming
I need some clarification.
Thanks, Carlene and Aekisu.
I thought that I should cover the metal as soon as it gets sand blasted. I guess that as long as it is kept dry (which should be easy since I live in a desert climate and we are in the 5th year of a drought) it won't get new rust? If it does a little sanding and the etching should take care of it, right? I guess that means start on panel and finish it, at least to the point of the initial coat of enamel primer, before starting the next panel.
I've learned a lot from this forum. Most of the items on my list were learned from all of you. Thanks.
I thought that I should cover the metal as soon as it gets sand blasted. I guess that as long as it is kept dry (which should be easy since I live in a desert climate and we are in the 5th year of a drought) it won't get new rust? If it does a little sanding and the etching should take care of it, right? I guess that means start on panel and finish it, at least to the point of the initial coat of enamel primer, before starting the next panel.
I've learned a lot from this forum. Most of the items on my list were learned from all of you. Thanks.
Admom
Joined: Feb 2001
Posts: 9,414
Likes: 201
From: Silver Springs
I need some clarification.
John,
You shouldn't have to do each panel seperately. I blasted the cab and doors at the same time and they just sat around until I found time to work with them - out of the weather of course. After all the welding and beating & stuff, I ended up having to do a little surface blasting from all the sweating beads dropping, hand prints and weld residue, but that was quick since it was just surface stuff. Then we hosed/cleaned them all and the Ospho took care of anything we missed.
Also did the 4 fenders all at once and now they're sitting on a shelf in the garage waiting for when I'm ready to give them some color.
You shouldn't have to do each panel seperately. I blasted the cab and doors at the same time and they just sat around until I found time to work with them - out of the weather of course. After all the welding and beating & stuff, I ended up having to do a little surface blasting from all the sweating beads dropping, hand prints and weld residue, but that was quick since it was just surface stuff. Then we hosed/cleaned them all and the Ospho took care of anything we missed.
Also did the 4 fenders all at once and now they're sitting on a shelf in the garage waiting for when I'm ready to give them some color.
