Frosting plexiglas

Thats what it looks like now before frosting.  On the surface, the letters are flush with the vinyl.  My girlfriend used to work at michaels and told me there is this stuff called frosted glass by krylon that will do what i want.

half true.  I do not have to worry about any other areas when I am doing the letters so yes on that but on the 1/4 " strip, I want to only frost that 1/4 " and nothing else.  On the letters, do I want to frost the front (surface) of the letters or the back (atached to other piece of plexi)?

well i got to experience both the good and bad side of spray frosting.  I went to michaels and got a can of krylon frosted glass spray and it worked like a charm

Pretty nice right?  Well, when I was attaching the letters to the clear piece of plexi a drop of the weld-on 3 got on the I in diamond and smudged the frosting, so naturally I had to fix it.  Michaels was closed by this time so i went to walmart.  Got frosted spray, still by krylon but in a different looking container.  It had some weird kind of reaction with the other stuff and gave a old weatheRED / cracked look.  So, I had to sand it all off and go buy another can from michaels to fix it.

Sanding, in my opinion doesn't give as good results.  I guess I could've have gone as high as 1000 grit wet sanded but even at 600 I still had small scratches.  With the frosting spray, there is none of that.  I found that spraying the front side worked best because when I sparyaed the back of a test piece, it made the piece look embossed which was not what I was going for.