Announcement

Collapse
No announcement yet.

Need Lacquer HELP

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Need Lacquer HELP

    I am trying Lacquer for the first time and it just turned into a disaster, after the second coat with Deft Clear Wood Lacquer ( it said no sanding brtween coats??) it bubbled on me. My queastion is can I sand of the bubbles and also not crazy about the finisn could I Poly over the Lacquer after sanding. I have 40 hours on these Dolphin Sculpture and needless to say I'm sick.
    Yea I walked through The Valley of Death and I kicked it's ***
    Semper Fi

  • #2
    G'day OWC,
    Putting cold finishes over hot is a tricky business.
    I don't know what would have made the lacquer bubble??
    You can Poly over it, but you have to give the item tooth so the poly will stick.
    You can do this by sanding back with no finer than 240g paper and apply thin coats.

    My only thoughts re the bubbling, is if you used a pressure pac, perhaps you held the can to close to the project and put the lacquer on to thick, thus introducing air to the finish. Unlike Poly, Lacquer is designed to be applied in a number of thin coats, cutting back between each. I have seen a number of products that claim no sanding between coats is necessary, but have yet to find this is true to obtain a nice finish.
    Good luck and you items are not beyond redemption.
    Regards
    John
    "The Golden Mile"John Wayne
    Some of my Stuff
    Retired Medically Unfit Police Officers ***.

    Comment


    • #3
      John, I can usually figure out what you are saying (pressure pac = aerosol can) but can you explain what you mean by cold finishes vs hot? Thanks
      T
      Theresa

      http://WoodNGoods.weebly.com

      http://woodngoods.blogspot.com

      Comment


      • #4
        I remember I had bubbles with spraying on Deft once,because it was too cold in my attic at the time, it was raining outside and I don't like to spray in the house or shop, so I use the attic, but on this particular day it may have been too cold up there.
        I just sanded everything down, and resprayed when it was warmer.
        Last edited by Wood Dog; 10-26-2011, 09:40 AM.
        Gloria ............... Two memorable things to say in life, "Hello" for the first time, and "Good-bye" for the last.

        Comment


        • #5
          When I've had a lacquer disaster, I used acetone to remove the whole mess and started from scratch. I use Minwax spray lacquer, and find that it is almost, but not quite, idiot-proof.

          I usually have to do some rubbing down (using 0000 steel wool) between coats unless I'm really lucky. And thin coats are the only way to stay out of trouble.
          Carole

          Follow me on my blog: www.scrollsawbowls.blogspot.com

          Comment


          • #6
            OWC,

            Could you give us a few more details about the way you applied the lacquer, what the conditions were when you applied it and as it was drying? I don't have a lot of experience with lacquer, but I would hope that you could salvage the existing finish, before doing anything drastic.

            Did the finish dry completely? If so, then it's probably not a problem with the product itself, such as it being old. You can probably safely sand it down smooth and either try another coat, or top with something else, but I would like to know more about your application technique and the temperature/humidity at the time you applied it before making a further suggestion.

            I know it's too late now, but the best advice I've ever gotten or read when it comes to trying new finishes, is to always test it first on a piece of scrap of the same wood and prepared in the same way as the end item. That way you can avoid unpleasant surprises on a project in which you've already invested significant time & effort.

            Good luck, hope this helps.
            Homer : "Oh, and how is education supposed to make me feel smarter. Besides, every time I learn something new, it pushes some old stuff out of my brain."

            Comment


            • #7
              I learned long ago that heating a spray can of any finish in hot tap water helps the spray work well.
              Hegner Polymax- 3,Hegner Multimax-3,
              "No PHD, just a DD 214"

              Comment


              • #8
                I have had bad luck with lacquer. Read somewhere (here?) that there should be at least 20 degrees difference between the temperature and dew point. I live close to Seattle so we get that condition about once a year. I don't even try anymore.
                Ron

                My sawdust gallery

                Comment


                • #9
                  G'day Theresa,
                  Here goes, it not hard and fast but generally this is the meaning.

                  A hot finish is a coating that has a chemical reaction to set it of. eg Lacquer will only set if mixed with thinners.
                  Hot finishes also adhere to the previous coat by softening it, thus making the multiple coats one solid coat.

                  A cold finish would be Poly, Varnish etc. These rely on the air and evaporation of the carrier to set up.
                  Once a coat is dry, the second coat requires some method of bonding to the previous one. This is normally done by cutting back each successive coat with a fine (not to fine) paper about 240/220g.
                  If this "Tooth" isn't provided you effectively get multiple layers of very thin plastic. This may last for years, or if exposed to sunlight or knocked and chipped the layers may start to separate.
                  Hope this is as clear as mud.

                  The problem with placing cold over top is
                  Originally posted by Forester21 View Post
                  John, I can usually figure out what you are saying (pressure pac = aerosol can) but can you explain what you mean by cold finishes vs hot? Thanks
                  T
                  Regards
                  John
                  "The Golden Mile"John Wayne
                  Some of my Stuff
                  Retired Medically Unfit Police Officers ***.

                  Comment


                  • #10
                    Thanks John!
                    You explained the difference great -but the message stopped when you got to the problem of using both....

                    T
                    Theresa

                    http://WoodNGoods.weebly.com

                    http://woodngoods.blogspot.com

                    Comment

                    Unconfigured Ad Widget

                    Collapse

                    Latest Topics

                    Collapse

                    • Linda In Phoenix
                      Reply to Shrink wrap systems
                      by Linda In Phoenix
                      I checked out www.ULine.com We used them years ago at the company I used to work at, and they were really reputable to work with. They have machines, guns, bags, and film. I just don't really know what works best, as well as if there is a really great priced to buy from. To date I've been a frugal...
                      Yesterday, 10:01 PM
                    • will8989
                      Reply to Dog Puzzle - Aussie
                      by will8989
                      Will check out amazon tomorrow. Thanks.
                      Yesterday, 09:53 PM
                    • will8989
                      Reply to Shrink wrap systems
                      by will8989
                      Well, I used to get my shrink wrap rolls from AC Moore, and just used the last roll😟. I use a heat gun but lately and only shrink the Sealife puzzles to keep the pieces in place. I only use it on puzzles because of my display board otherwise I would have broken pieces all over the place. Also easier...
                      Yesterday, 09:49 PM
                    • will8989
                      Reply to Bruce, the one on probation
                      by will8989
                      He’s gotten me through some pretty tough times and always has my back so It’s the least I can do. Good thing I had the freezer stocked! That has been a time saver. I made a pot of chili on Sunday and got 6 meals out of it! As for payback, I’m getting a new shed in the spring! I had to do my flap...
                      Yesterday, 09:32 PM
                    • will8989
                      Reply to Sundays market
                      by will8989
                      We did. I only went $40 over budget. I got a 73” x 12” x 3/4” curly cherry for $55. Just needs to be run through the sander and cut to size. It’s a pinkish cherry and is so pretty. A piece of deep red redwood, 2 pieces of walnut each about 12” wide. Good haul.
                      Yesterday, 08:56 PM
                    Working...
                    X