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How to Coat Pigmented H20 over Solvent CV9/28
I have a client who wants their Walnut Panels (on Z clips) painted. Current condition of Walnut is extreme color fade due to UV exposure and numerous paintings in 20 X 15 foot room with 9 foot ceiling.
I know the panels are coated with a clear solvent CV. I spray with a Kremlin 10-14 for on-site work.
This is what I had in mind. First coat Zinsser 'Bin-Shellac' white. Sand, correct for defects and then another coat of White Bin-Shellac. Pigmented top coat from Ilva 2K poly. I know Zinsser makes an H20 'Advance' shellac, but have no experience with the product. Need to go low odor on the job....high rise condo.
Any other suggestions for handling this project would be helpful.
Ilva 2K poly is definitely not low odor or job site friendly (isocyanate exposure) However if you are going that route skip the shellac and just use TF25 which is Ilva's isolante.
Clean all surfaces, scuff sand 320 for adhesion, spray one coat of TF25 wait 2 hours and then you can spray your pigmented 2K right over the TF25 without sanding. This should assure good adhesion. After drying you can scuff and apply another coat if you don't get acceptable coverage of the color you are using.
FYI...Bin's "WB synthetic shellac" is not a great choice as a barrier coat if you plan to top coat with WB lacquers/CV or other spray only WB finishes as it is fairly slow to cure causing crazing...my distributor gave me a couple of gallons to try out on a rush job where the home owner insisted on only WB materials ( WB lacquer refinish of 1970's era birch/alder kitchen stained dark walnut with nitro top coat).
Ilva now makes a Waterborne 2K poly...number is PW710
I have used the clear on a previous job and liked it....the pigmented I hope with a hardener added will be just a user friendly to apply on site.