I use Masking Tape and it works like a charm! It's quick, it's clean, and it seals the seams when I pour Rondo in it. I Don't have to resin the pieces before I rondo and it's over all the best way to quickly build peps.
I also cut off all the tabs so the seams match up perfectly so there is no over lap on the pieces or spaces for rondo to get between the two sheets of paper.
I also remove all the tape once I pour in my rondo. The heat of the rondo losesn the adhesive on the tape to is comes off really easy.
Then I take the piece in the shower and wash off all the paper.
This leaves me a nice smooth clean piece without the mess of Glass and Resin.
Here is my build on the OC site:
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