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Post Cat Finish --  0 -- 
3/14
I Use ML Campbell Krystal and DuraVar Plus on a regular basis. When I'm finishing a porous wood like African Mahogany, I spend a lot of time with the compressed air gun cleaning the sanded finish dust out of the pores between coats. Sometimes I also wipe the wood with a thin wash of lacquer thinner after the air dusting.
To my understanding- because this is a cross linking, post cat finish, the new coat doesn't burn in to (or amalgamate) the previous coat. So to my thinking, any residual finish dust residue will not re-disolve with the new coat. Therefore, it can appear "in or under" the new finish coat. That's why I think its important to thoroughly clean the dust away between coats. More so than with Nitrocellulose lacquers.
Does anyone else use the same or similar caution when cleaning between coats? Have you any suggestions or tricks to share, regarding what works for you?
I'm looking for a way to reduce the time I spend detail cleaning the finish out of the pores. Thank you.
3/14 #2: Post Cat Finish ...
There are hardly any coatings that have true chemical bonding between coats. The vast majority go way past their green curing stage by the time you sand them and recoat.
Matter of fact you would not be able to sand them during the green stage. They would clog the sand paper.
There are no short cuts in finishing. Sounds to me like you are doing it the correct way.
Depending on the product you can spray coat to coat with no abrasion to build the finish. You need a good spray environment to keep the dust from landing in the coats. You also need to truly know the product, which would require you to talk with the technical department of the company that makes your product. MLC has a very good tech dept.
You will get better and more responses in the Finishing Forum.
3/16 #3: Post Cat Finish ...
We fill open grain like mahogany with a slurry of grain filler mixed with the intended stain. The pores are filled. I would not spend the time washing the wood down with thinner or blowing out the pores individually. Wipe it down after a scuff, blow it off and move on.
We use a myriad of finishes from Becker Acroma, Sherwinn Williams, Chemcraft, Gemini, ML Campbell, ranging from precat to post cat and don't experience this.
5/23 #4: Post Cat Finish ...
Adam and Cabinetmaker,
Thank you for your replies.
Rick
0 --
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