| View previous topic :: View next topic |
| Author |
Message |
catbrain
Member
Joined: 22 Sep 2023
Posts: 49
Location: Greeneville TN.
|
 Posted: Mon Oct 30, 2023 12:09 am Post subject: test of plaster-silica casting powder for ground coat |
 |
|
Ok- I tried a solution of this casting material I got at hobby lobby.
It said on label that it is 5 times stronger than straight plaster.
i made a dilute solution and painted it on let it sit about 1 min- then wiped off the excess water with a wash cloth. Did this about 3 times. Also tried rubbing a slurry in with my fingers. Then wiped dry again. Let dry over night.
It definitely made a hard shell. So hard my scraper would not cut into it in places. so It took about 2 hours to get it scraped/sanded down. (didnt want to use any sandpaper- but---)
now in scraped down where the wood is showing again. What I cant tell is if there is now any product still left in the wood' surface. (????)
I guess the next move is i am going to either spray or wipe on a coat or two of yellow tinted shellack. Then maybe a coat of red or red-brown (dilute colored so as to not get too dark. )
Might be a plan of mice and men----  but it seems that way each time ! |
|
| Back to top |
|
 |
jeffreestar
Junior Member
Joined: 14 Aug 2024
Posts: 1
|
| Posted: Sat May 03, 2025 5:17 am Post subject: Re: test of plaster-silica casting powder for ground coat |
|
|
| catbrain wrote: | Ok- I tried a solution of this casting material I got at hobby lobby.
It said on label that it is 5 times stronger than straight plaster.
i made a dilute solution and painted it on let it sit about 1 min- then wiped off the excess water with a wash cloth. Did this about 3 times. Also tried rubbing a slurry in with my fingers. Then wiped dry again. Let dry over night.
PolyTrack
It definitely made a hard shell. So hard my scraper would not cut into it in places. so It took about 2 hours to get it scraped/sanded down. (didnt want to use any sandpaper- but---)
now in scraped down where the wood is showing again. What I cant tell is if there is now any product still left in the wood' surface. (????)
I guess the next move is i am going to either spray or wipe on a coat or two of yellow tinted shellack. Then maybe a coat of red or red-brown (dilute colored so as to not get too dark. )
Might be a plan of mice and men---- but it seems that way each time ! |
Your plan with the tinted shellac sounds like a thoughtful next step. The yellow can act as a nice base, and then the dilute red or red-brown could add some warmth and depth without overpowering the wood grain. It's a good approach to build up the color gradually. |
|
| Back to top |
|
|
Anthona
Junior Member
Joined: 08 Sep 2025
Posts: 3
|
| Posted: Fri Jan 09, 2026 3:32 am Post subject: Re: test of plaster-silica casting powder for ground coat |
|
|
| catbrain wrote: | Ok- I tried a solution of this casting material I got at hobby lobby.
It said on label that it is 5 times stronger than straight plaster.
i made a dilute solution and painted it on let it sit about 1 min- then wiped off the excess water with a wash cloth. Did this about 3 times. Also tried rubbing a slurry in with my fingers. Then wiped dry again. Let dry over night.
It definitely made a hard shell. So hard my scraper would not cut into it in places. so It took about 2 hours to get it scraped/sanded down. (didnt want to use any sandpaper- but---)
now in scraped down where the wood is showing again. What I cant tell is if there is now any product still left in the wood' surface. (????)
I guess the next move is i am going to either spray or wipe on a coat or two of yellow tinted shellack. Then maybe a coat of red or red-brown (dilute colored so as to not get too dark. )
drive mad
Might be a plan of mice and men---- but it seems that way each time ! |
What techniques can be used to determine if any residual casting material remains in the wood surface after scraping and sanding? |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
