Clear Coat

This forum is for general discussion about Aspire

Clear Coat

Postby highpockets » Sat Oct 14, 2017 10:50 pm

I'm trying an experiment, I'm making a sign with some box store blue foam board. It's carved and I'm in the process of spraying on the base coat. The sign will be spray painted with acrylic paint. The problem is I need a clear coat that will produce a hard surface that will protect the paint as well as prevent damage to the foam board base.

I need suggestions for a clear coat that will produce a nice hard coating.
John
Maker of Chips
User avatar
highpockets
Vectric Wizard
 
Posts: 1279
Joined: Tue Jan 06, 2015 4:04 pm
Model of CNC Machine: PDJ Pilot Pro

Re: Clear Coat

Postby ger21 » Sun Oct 15, 2017 12:00 am

You typically want to put a hard coating on before paint. I don't think you'll find anything that will really add hardness, without a LOT of coats, which itself is not really a good idea.
Your best bet would maybe be water based poly.
Gerry
ger21
Vectric Wizard
 
Posts: 856
Joined: Sun Sep 16, 2007 2:59 pm
Location: Shelby Township, MI, USA

Re: Clear Coat

Postby mezalick » Sun Oct 15, 2017 9:49 am

How about using FoamCoat ?
http://us.rosco.com/en/product/foamcoat

Michael
Michael Mezalick
https://carveddetails.com/catalog-book/
mm@mezalick.com
User avatar
mezalick
Vectric Wizard
 
Posts: 2225
Joined: Mon Nov 03, 2008 9:07 am
Location: Philadelphia, PA USA
Model of CNC Machine: Camaster Cobra

Re: Clear Coat

Postby highpockets » Sun Oct 15, 2017 5:08 pm

Gerry & Michael, thanks for your replies. Being this is my first shot at working with foam of course I had to do things backwards :D :D :D I know now I should have put a hard coat on the foam before painting. It looks like FoamCoat will work for me in the future. I'm past that point with this project (unless it comes out a complete failure :oops: ). Right now I'm looking at going with a clear Epoxy coating.
More to follow on this project.....
John
Maker of Chips
User avatar
highpockets
Vectric Wizard
 
Posts: 1279
Joined: Tue Jan 06, 2015 4:04 pm
Model of CNC Machine: PDJ Pilot Pro

Re: Clear Coat

Postby redwood » Wed Oct 18, 2017 3:01 am

If this sign is going outside, most epoxies are not UV resistant and even if they are, they will probably yellow to some degree.
redwood
Vectric Craftsman
 
Posts: 149
Joined: Wed Apr 13, 2016 3:38 am
Location: No. Calif.
Model of CNC Machine: Axiom Pro6

Re: Clear Coat

Postby highpockets » Wed Oct 18, 2017 3:23 am

redwood wrote:If this sign is going outside, most epoxies are not UV resistant and even if they are, they will probably yellow to some degree.


Thanks, but the sign is for the front of a reception desk inside. It shouldn't get too much sunlight.
John
Maker of Chips
User avatar
highpockets
Vectric Wizard
 
Posts: 1279
Joined: Tue Jan 06, 2015 4:04 pm
Model of CNC Machine: PDJ Pilot Pro

Re: Clear Coat

Postby Craig Thompson » Thu Oct 19, 2017 1:24 am

Do you think an epoxy resin could work. It will be hard and glossy.
User avatar
Craig Thompson
 
Posts: 28
Joined: Sun Jun 12, 2016 5:11 pm
Location: Amherst Texas
Model of CNC Machine: Laguna Swift 4x4

Re: Clear Coat

Postby highpockets » Thu Oct 19, 2017 1:28 am

Craig Thompson wrote:Do you think an epoxy resin could work. It will be hard and glossy.


That's the direction I'm leaning....
John
Maker of Chips
User avatar
highpockets
Vectric Wizard
 
Posts: 1279
Joined: Tue Jan 06, 2015 4:04 pm
Model of CNC Machine: PDJ Pilot Pro

Re: Clear Coat

Postby Olle » Sun Oct 22, 2017 9:17 am

I'm looking for suitable materials to make some indoor signs, so what kind of foam is it and how are you cutting it?
Olle
Vectric Craftsman
 
Posts: 105
Joined: Wed Sep 28, 2016 4:51 pm
Model of CNC Machine: Laguna MCNCIQ

Re: Clear Coat

Postby highpockets » Sun Oct 22, 2017 12:45 pm

Olle wrote:I'm looking for suitable materials to make some indoor signs, so what kind of foam is it and how are you cutting it?


Don't go by what I'm doing just yet, this is an experiment... I'm using a 4x8 sheet of blue insulation Dow Styrofoam from one of the big box stores.

I've made some mistakes in handling this project (it's an experiment), when I get the final project done I'll report on my findings.

As for what I used to cut the foam with, I used ball nose cutters to shape it and an end mill to cut it out. Nothing special. I did learn (the hard way) to remove the plastic film covering on the face of the sheet. In my test cut the film melted to my cutter and made a big mess of both the cut and the bit.

The parts of the sign have been primered and painted now just waiting for the paint to cure before applying the clear coat. So far I'm happy with the results just not the procedures for getting here....

2017-10-21 14.27.45.jpg
John
Maker of Chips
User avatar
highpockets
Vectric Wizard
 
Posts: 1279
Joined: Tue Jan 06, 2015 4:04 pm
Model of CNC Machine: PDJ Pilot Pro

Re: Clear Coat

Postby Makingtoothpicks » Sun Oct 22, 2017 6:09 pm

Do let us know when you get it worked out. I have tried the BBS foam and could
not get a smooth finish like you show. I know it cuts easy leaves a mess. I tried
a couple of things but could not get a smooth finish.

Don
User avatar
Makingtoothpicks
Vectric Wizard
 
Posts: 344
Joined: Tue Jul 23, 2013 8:46 pm
Location: Burien, Wa
Model of CNC Machine: Cncrouterparts CPR2448

Re: Clear Coat

Postby mezalick » Sun Oct 22, 2017 6:45 pm

Looks really nice...
Just a note.
Lets not confuse the blue or pink foam sold in the big box stores with HDU.
Yes, HDU is really expensive when compared to the other foam material but has it's value.
Now, with that said and from what I see here....I may need to rethink the type of foam used.. but I don't think I could get the same great results..

Michael
Michael Mezalick
https://carveddetails.com/catalog-book/
mm@mezalick.com
User avatar
mezalick
Vectric Wizard
 
Posts: 2225
Joined: Mon Nov 03, 2008 9:07 am
Location: Philadelphia, PA USA
Model of CNC Machine: Camaster Cobra

Re: Clear Coat

Postby highpockets » Sun Oct 22, 2017 6:45 pm

Lot of work from CNC to paint....

2017-09-13 21.29.50.jpg
John
Maker of Chips
User avatar
highpockets
Vectric Wizard
 
Posts: 1279
Joined: Tue Jan 06, 2015 4:04 pm
Model of CNC Machine: PDJ Pilot Pro

Re: Clear Coat

Postby highpockets » Sun Oct 22, 2017 6:50 pm

mezalick wrote:Looks really nice...
Just a note.
Lets not confuse the blue or pink foam sold in the big box stores with HDU.
Yes, HDU is really expensive when compared to the other foam material but has it's value.


Thanks for the clarification Michael.

HDU isn't easy to find around here, or I should say I've had a hard time finding it. So I decided to try something different.

If I was trying to do this all the time HDU would be my choice....
John
Maker of Chips
User avatar
highpockets
Vectric Wizard
 
Posts: 1279
Joined: Tue Jan 06, 2015 4:04 pm
Model of CNC Machine: PDJ Pilot Pro

Re: Clear Coat

Postby sseale » Mon Oct 23, 2017 1:00 am

Really clean machining. Is that the regular 15psi Dow board? Was thinking of trying some of the higher rated (underslab, load bearing) 80-100psi blue board and OwensFoamular Pink H100 but if the 15psi is producing this result then no real need!
sseale
 
Posts: 48
Joined: Fri Dec 11, 2015 2:42 pm
Location: Barbados
Model of CNC Machine: Probotix Nebula

Next

Return to Aspire - General

Who is online

Users browsing this forum: No registered users and 21 guests