How do I remove 4200 from Lexan?

[kaakre]

One of my ace workers has left a half inch wide smear of 4200 around the edge of my new lexan portlights.

Any ideas on how to get the 4200 off the lexan without destroying it?

[Freesail99]

Debond 2000 may work. How long has it been on the lexan ? There is also a 3m product, but I can't recall the name.

[kaakre]

It will have been on the lexan for about three months.

[kaakre]

I did some internet searching. Apparently Debond 2000 cannot be used on plastic or lexan.

[Freesail99]

If you consider labor, it may be cheaper to replace the lexan. The debond was the first thing that came to me.

[Banshi]

Did you try just rubbing back and forth on it with your finger, usually most caulks will lift off a slick surface when rubbed hard enough. I think anything strong enough to break down the caulk would probably damage the Lexan.

[kaakre]

Thanks Banshi,

I will give it a go when i get back there. This was the last thing we completed before I left on Friday and I had no time to play with it.

[camaraderie]

kaakre...3M only lists mechanical means for removal after curing. Razor blades, putty knives and sanding. If you get most of it off with a blade you might try some very fine (400-600 grit) wet sanding for the remainder but try this on a small area first as the lexan is easily dmaged.

[parttimesailor]

Originally Posted by camaraderie

kaakre...3M only lists mechanical means for removal after curing. Razor blades, putty knives and sanding. If you get most of it off with a blade you might try some very fine (400-600 grit) wet sanding for the remainder but try this on a small area first as the lexan is easily dmaged.

I think almost any abrasives or tools are likely to leave marks in the LEXAN.

[bubb2]

If you have a buffing wheel on a grinder use buffing conpound the only way I know. Caswell Inc. - String Buffs