Reply by Builder22

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Posted on Waterbased Finish - Mixing Manufacturers

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5 posts in 2382 days

#1 posted 07-01-2017 01:53 PM

For those out there a bit daring and wishing to try something different, I gave it a whirl. The TC bonded very well to the GF poly, amazingly well on samples. TC advertises its coating can be applied over a wide range of substrates including plastic, so why not give it a try. The finish surface was a much higher quality than using only the TC product over the cut shellac. The GF coating (2 coats) really flattens and levels out much nicer than the TC, made a really nice prelim topcoat. The end result was a premium looking finish after the TC WB lacquer was sprayed (only 1 coat was required). The GF also goes on in thinner coats. The TC likes to go on heavier. It made for a thinner overall finish than using the TC alone.

The only reason I did not pursue this finish, although supposed to be a clear finish, the GF WB poly yellowed intensely on the initial panels I tried. The prelim sample did not yellow like the end panels. Unfortunately, I abandoned the process due to the color. There was something else going on there since the GF yellowed before applying the TC topcoat. Straight TC without the GF did not yellow on the same panels. Will follow up on that at a later date.

The fact remains, the combined finishes, outside of the color issue, was a very, very nice finish. I was using Satin on both. The GF tends to have a higher gloss on its satin than the TC. The GF WB poly coat gave it a much harder and more durable finish than spraying the TC alone. I would never have applied the WB poly over the WB lacquer (ie. WB acrylic) since the poly was much harder than the softer TC acrylic (an almost plastic type finish). Never apply a harder finish over a softer finish unless you want really big problems (a reason we cut shellac instead of applying straight for sealer coats). It was a great experiment that I will keep it in my back pocket and use this process in the future, since I really liked how the end finish looked and felt.

If anyone else, has tried anything daring, please share. Nothing ventured, nothing gained!

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