I use Sig Nitrate thinned 50/50 for the first coats for good adhesion then added some filler for 2 coats but after that it seems like it takes allot of dope before it stops soaking in. What's the point of using soft wood if you just have to load it with paint. Is there a way to avoid this? I doped on some .2oz carbon tissue no sizing but all the coats after that seemed to soak right through. So many coats but it never covered the carbon to the point I felt I could sand it level. This light weight wood is like a sponge, what's the solution?

Thanks,
MM

Have you covered light wood with anything else?  My experience with that stuff leads me to believe that it's the CF veil itself that's soaking up gallons of dope, not the wood underneath.

I'm not sure how you're doing it, but in my very limited experience I get a few coats of dope on the bare wood first, just like I'm going to apply silkspan.  Then I put on the veil.