Rust through paint.
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Tuned
Joined: Jan 2010
Posts: 470
Likes: 9
From: San Diego, CA
Rust through paint.
I have a 1974 F250 I'm starting to prep for paint. The paint on the truck is the original paint. over the years the paint has very little cracks and has allowed rust to to come through the paint. My question is do I need to take it down to bare metal or can I sand and seal it?
Tuned
Joined: Aug 2007
Posts: 459
Likes: 123
From: Maryland
If the rust is coming through the paint now, spraying a sealer over top is not going to fix the issue. You'll need to expose it and remove the rust.
As a word of caution, before jumping on the rust conversion bandwagon, be advised that some epoxy primers are not compatible. You're basically spraying an acid on the metal surface, and in some cases they will indeed react months after paint application, causing lifting/delamination issues. I would suggest to figure out what primer you will be using and then see if it is compatible with these conversion coatings. If not, you'll need to re-think your strategy. I suggest starting with identifying the paint first, as Ospho, Picklex, etc are less forthcoming in putting out this info. Paint manufacturer's will be more up front about what their products are compatible with. Nice to know up front, as pricey as paint products are...
As a word of caution, before jumping on the rust conversion bandwagon, be advised that some epoxy primers are not compatible. You're basically spraying an acid on the metal surface, and in some cases they will indeed react months after paint application, causing lifting/delamination issues. I would suggest to figure out what primer you will be using and then see if it is compatible with these conversion coatings. If not, you'll need to re-think your strategy. I suggest starting with identifying the paint first, as Ospho, Picklex, etc are less forthcoming in putting out this info. Paint manufacturer's will be more up front about what their products are compatible with. Nice to know up front, as pricey as paint products are...
Cargo Master
Joined: Apr 2010
Posts: 2,936
Likes: 9
From: Acworth, GA
My epoxy primer came from this manufacturer;
Product Lines
I have found it to be a very quality product, and the price is right. They also have a forum with some very interesting info;
SPI User Forums
You can read more about their primer and other things there.
And this is an absolute must read;
Perfect Paint Job
Good luck and post some pictures of your progress.
Product Lines
I have found it to be a very quality product, and the price is right. They also have a forum with some very interesting info;
SPI User Forums
You can read more about their primer and other things there.
And this is an absolute must read;
Perfect Paint Job
Good luck and post some pictures of your progress.
Moderator
Joined: Aug 2002
Posts: 6,104
Likes: 384
From: Southern California
If the rust is coming through the paint now, spraying a sealer over top is not going to fix the issue. You'll need to expose it and remove the rust.
As a word of caution, before jumping on the rust conversion bandwagon, be advised that some epoxy primers are not compatible. You're basically spraying an acid on the metal surface, and in some cases they will indeed react months after paint application, causing lifting/delamination issues. I would suggest to figure out what primer you will be using and then see if it is compatible with these conversion coatings. If not, you'll need to re-think your strategy. I suggest starting with identifying the paint first, as Ospho, Picklex, etc are less forthcoming in putting out this info. Paint manufacturer's will be more up front about what their products are compatible with. Nice to know up front, as pricey as paint products are...
As a word of caution, before jumping on the rust conversion bandwagon, be advised that some epoxy primers are not compatible. You're basically spraying an acid on the metal surface, and in some cases they will indeed react months after paint application, causing lifting/delamination issues. I would suggest to figure out what primer you will be using and then see if it is compatible with these conversion coatings. If not, you'll need to re-think your strategy. I suggest starting with identifying the paint first, as Ospho, Picklex, etc are less forthcoming in putting out this info. Paint manufacturer's will be more up front about what their products are compatible with. Nice to know up front, as pricey as paint products are...
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Thunderjet4x4
1973 - 1979 F-100 & Larger F-Series Trucks
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Apr 28, 2008 07:11 PM
