Join Date: Sep 1999
Thanked 0 Times in 0 Posts
Re: CJ7 back window replacement
You just pass the flame over it, it is just like any plastic. It melts.
It is like welding! Take some time to practice on scrap pieces, till you can gauge the amount of time and distance just to clear it. Too long and it will melt and either turn black from carbon, or Craze giving the look of fine cracks or bubbles in the plastic.done right you can't even tell it was done.
Naturally it won't take out deep gouges but it may soften them up, and if you are doing edges smooth them out as much as you can first and clean off any clinging dust and residue or it will burn before the scratches clear..Plexiglass is very static electric prone, so all that residue wants to stay just where you don't want it.
It also tends to get pretty brittle in the cold weather, at that point it breaks easier than in warmer weather.
I don't know about 1/2 inch but the quarter in stuff I used tended to crack at the hardware mounting holes.
That original post about flame polishing was from 2002. I think ? Anyhow I just gave the whole thing up and cut the hard top down to a half hard top. much easier to handle.