Do i need to use glass to lap my sink?

[xander5000]

i don't have any glass. what now?

 

[SnowPunk98]

You dont HAVE to but its the best cause its perfectly flat

 

[Maxpane]

Use a mirror, same thing.

 

[Boogak]

Just buy a picture frame from your local Walmart for $3 and use that glass pane off of that.

 

[MichaelD]

I bought an 8x10 piece of very thin glass from Home Depot for about a buck.