Finish Bubbles

This section is for useful tips and tricks for Aspire
Post Reply
User avatar
Rcnewcomb
Vectric Archimage
Posts: 5887
Joined: Fri Nov 04, 2005 5:54 am
Model of CNC Machine: 24x36 GCnC/WinCNC with ATC
Location: San Jose, California, USA
Contact:

Finish Bubbles

Post by Rcnewcomb »

This is a "don't do what I did" tip.

When applying lacquer on a warm day make sure you allow adequate time between applications. If the lacquer hasn't properly dried and you apply another coat, bubbles will appear where the finish underneath was still releasing vapors. It takes a lot of sanding to clean up after this.

BTW, the material is redwood. The lacquer was Deft Satin finish (rattle can).
photo 1.JPG
- Randall Newcomb
10 fingers in, 10 fingers out, another good day in the shop

User avatar
TReischl
Vectric Wizard
Posts: 4596
Joined: Thu Jan 18, 2007 6:04 pm
Model of CNC Machine: 8020 48X36X7 RP 2022 UCCNC Screenset
Location: Leland NC

Re: Finish Bubbles

Post by TReischl »

Nasty. Thanks for the tip.

moto633
Vectric Wizard
Posts: 1123
Joined: Sun Jul 13, 2008 11:59 am
Location: Rockbridge, Ohio

Re: Finish Bubbles

Post by moto633 »

Great tip for rattle can lacquer. I spray A LOT of shop grade lacquer. If you are using a sprayer for applications make sure you get some lacquer retarder.
It will make the finish come out without the blemishes.

Sorry to hijack Randall...

kilrabit
Vectric Wizard
Posts: 498
Joined: Thu Feb 26, 2009 4:04 am
Location: Uvalde Texas

Re: Finish Bubbles

Post by kilrabit »

patience..... Grasshopper

User avatar
gordread
Vectric Wizard
Posts: 382
Joined: Sun Jul 08, 2012 3:29 am
Model of CNC Machine: CNC Professor HDX
Location: Onoway, Alberta
Contact:

Re: Finish Bubbles

Post by gordread »

Finishing has got to be one of the hardest most esoteric things we can do in woodworking. Thank you for the tip.

Gordon

Will Williamson
Vectric Craftsman
Posts: 214
Joined: Sat Apr 26, 2008 2:45 pm
Model of CNC Machine: Thermwood CS-45 5 x 10
Location: Capac, Michigan
Contact:

Re: Finish Bubbles

Post by Will Williamson »

When ever I spray a finish coat, The first coat I reduce with 25 % thinner. that allows the top coat to sink into the wood and displace the trapped air. That is what is causing your top coat to bubble. Your top coat dried too fast and trapped the air. Putting it in the sun made it worst. And if it persisted, add retarder. This thinned top coat is referred to as a piss coat in the trade
Will Williamson willmade.com
Williamson Lumber & Millwork Inc.
Capac, Michigan

Post Reply