Por-15 on roof
POR-15 sux.
What you want is OSPHO, It is a water thin, acid based rust KILLER!
It stops the corrosion process, which is the root cause of your problem.
Any paint applied over any rust, merely hides the problem and allows the corrosion process to continue.
Here is the science behind how OSPHO works.
- Corrosion on steel is iron oxide.
- OSPHO has a percentage of Phosphoric Acid in it.
- when Phosphoric Acid comes into contact with iron oxide it changes on a molecular scale to iron phosphate.
THEN you sand if desired & paint.
Do not go thin on your paint.
If you don't know what a mil gauge is look it up and get one.
Anyone who shoots any paint over any rust is merely sending the problem down the road to be dealt with later. The oxidation process MUST be stopped, without doing so you're just masking the problem. It may look good for a while but that oxidation is still alive under the paint.
Ace Hardware $30
Happy motoring to all.
POR-15 sux.
What you want is OSPHO, It is a water thin, acid based rust KILLER!
It stops the corrosion process, which is the root cause of your problem.
Any paint applied over any rust, merely hides the problem and allows the corrosion process to continue.
Here is the science behind how OSPHO works.
- Corrosion on steel is iron oxide.
- OSPHO has a percentage of Phosphoric Acid in it.
- when Phosphoric Acid comes into contact with iron oxide it changes on a molecular scale to iron phosphate.
THEN you sand if desired & paint.
Do not go thin on your paint.
If you don't know what a mil gauge is look it up and get one.
Anyone who shoots any paint over any rust is merely sending the problem down the road to be dealt with later. The oxidation process MUST be stopped, without doing so you're just masking the problem. It may look good for a while but that oxidation is still alive under the paint.
Ace Hardware $30
Happy motoring to all.
