Re: sanding sealer

Krylon Matt Finish does quite well.  Especially good if you raise the grain first.

Re: sanding sealer

Are you asking about lacquer sanding sealer, water based sanding sealer, or something else? Thinned shellac makes a good sanding sealer. I hope you are asking about a quart size, because gallon sizes are now close to $100 or more!

Re: sanding sealer

If I'm looking for a true sanding sealer, I generally use either thinned Deft lacquer or thinned shellac. Which I use is determined by what my final finish will be (or, more typically, whichever is closest to hand). However, on the lathe I generally wet sand with walnut oil as my lubricant. If I do that, there generally isn't the need for a sanding sealer.

Re: sanding sealer

I sometimes use Mylands SS -- it's a cellulose lacquer and is best when thinned 50/50 with lacquer thinner.  

Re: sanding sealer

Zinsser SealCoat Sanding Sealer, 100% wax free Shellac

Re: sanding sealer

what is the best thinner for shellac?

Re: sanding sealer

There is only one thinner for shellac, alcohol. In most cases denatured alcohol, but access to that in California has caused some of those folks to be creative.