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If this lacquer feels gummy after a week....

 
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BeauZeau



Joined: 26 Dec 2015
Posts: 21
Location: Durham, NC USA

PostPosted: Tue Aug 29, 2017 11:04 am    Post subject: If this lacquer feels gummy after a week.... Reply with quote

Hello.

I used some old spraycan lacquer to touch up a repair. It potentially will look okay after some smoothing but it feels gummy after a week. Does this mean bad or stale paint? Do I have to wait a year before feathering the edges? Should I wash it off and use something else? If so, what?

Thanks
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Lon



Joined: 30 Dec 2003
Posts: 6086
Location: Stephenville, TX

PostPosted: Tue Aug 29, 2017 2:44 pm    Post subject: Reply with quote

It could be bad nitro but usually doesn't go bad. If you can, wait 3 more weeks and then do the fingernail test. It might cure out hard by then
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BeauZeau



Joined: 26 Dec 2015
Posts: 21
Location: Durham, NC USA

PostPosted: Tue Aug 29, 2017 9:05 pm    Post subject: Reply with quote

Okay, thanks.
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Jib



Joined: 20 Dec 2016
Posts: 28

PostPosted: Wed Aug 30, 2017 12:32 am    Post subject: Reply with quote

I've had good luck with shellac for touch up repairs. Transtint dyes (or the Colortone dyes that Stewmac sells, same thing) blend perfectly with them.

Every time I use it, it sets up fast, and relatively hard. Buffing it out with Meguiar's no. 7 mirror glaze and a rag seems to bring out some shine.

Formby's or Tru-Oil seem to adhere very well over shellac too, if you need some extra gloss. I've had Formby's stay gummy for a long time, but if I wipe it off and then put a coat of shellac on, it adheres better and dries fast.

In a perfect world, I've found airbrushing it on works best. I just use a cheap Badger airbrush, one of those little glass jars and a metal cap from Badger, as I find the airbrush seats a lot better with those.

I haven't mastered wiping or brushing shellac on, but it can be done. I've even dabbed it on with a paper towel with OK results.

When I'm doing light finishes I'll put shellac and olive oil on a rag and wipe it on. Not sure if the olive oil is a good idea on a touchup repair but it does help the shellac "glide" without sticking and it seems to lay on more evenly.

I haven't tried the plain Zinsser shellac (non pigmented) but I'd imagine you could use it just like home-mixed shellac. I'd imagine one of those Preval aerosol cans could shoot shellac if you don't have access to a gun. I've been tempted to try the Zinsser in a gun.

Grain alcohol and shellac are expensive. Might be worth trying a can of the plain Zinsser shellac and a Preval sprayer if you don't have a compressor setup.

Either way, if you're not familiar with shellac, it'll be great to get acquainted with. It's had a pretty big impact on my touchup repairs since I tried it for the first time, when I only had experience with nitro lacquer previously.
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