I have seen the concept of plasticizer mentioned in some finishing articles and I have a few questions.

Why use plasticizer in dope?  I assume it makes the covering less brittle and more flexible.

I am planning on using silkspan on a Ringmaster - is plasticizer a good thing on silkspan covering?

I think Brodak has a product but I also recall someone using something more common but I cannot remember what it is.  It seems that a few drops was all it took.   

Anyone have any experience good or bad with the concept and actual use?

Thanks,
Steve

Is that one drop per unthinned or thinned ounce of dope? The second question would be does this also reduce the amount of shrinkage?

Hi,

I have used Sig Lite Coat clear and found it to have different sanding characteristics than Sig Super Coat clear.  Also, Super Coat clear with Dave Brown's "Flex All" added ( about half of what the instructions suggest) also have different sanding properities.

The Lite Coat and Super Coat with "Flex All' added wanted to roll up under the paper when I tried to dry sand them; wet sanding is OK, however.

As usual, YMMV!

Jim