o1marc said:
I use straight 100% liquid methylene chloride, nasty stuff. Keep it in a plastic vat. BTW, it comes delivered in a plastic drum.
Do you store it in a polypropylene drum? There are thousands of types of plastics. Some are resistant to certain chemicals, some are resistant to other chemicals. You know why many people prefer Viton o rings? Yeah, it's kind of related to this conversation.
o1marc said:
My statement had nothing to do with plastic or the issue a hand, it was merely a statement in fact.
We're talking about a plastic fuel tank. Why are you making comments or suggestions that have nothing to do with plastic?
o1marc said:
In my powder coating operation I use straight 100% liquid methylene chloride, nasty stuff.
Think about this statement for just one minute. Why do you use methylene chloride (and acetone) in powder coating? To remove powder coat, maybe? There are several types of powder coating, as you know, two of which are thermoplastics or a thermoset polymers. Polyethylene is a thermoplastic. Crazy. So, is it a surprise that a chemical used in removing a thermoplastic may not be good for removing paint from a thermoplastic?
And yes, when you made this comment, which quoted my comment warning against using aircraft stripper, I think you were being a smart ass...
o1marc said:
All Aircraft Strippers warn against using them on actual aircraft also. ;D
Here's the deal: You probably consider yourself a good powder coater. And you probably consider yourself an expert in the field, as well as one on paint. Maybe you are. But for you to advise someone to use a chemical on a plastic, for which you have no idea of the composition, is irresponsible. I'm sorry you think I'm a dick for pointing it out. If there is any uncertainty, then it's probably not a good idea to use that chemical on the plastic without further testing on something expendable with the same composition. Maybe it's fine. Maybe it's not. The problem is, if it's not fine then someone is out a tank. If he doesn't use the chemical, then he's just out some sweat.