|
Rank: Advanced Member Groups: Member
Joined: 8/12/2002 Posts: 851 Location: New York
|
I know this has been answered in the past but I can't find the past answer. I am painting some brass pieces that I soldered. After, I washed off all the flux, dried the part and applied rust oleum primer from a spray can. When that was dry I used a rust oleum CAT yellow paint. Most all the various areas took the paint wonderfully except one 4 inch long piece. This part has all this crazing on the front of the part but NO crazing on the back part?? So I wait 4 days, crazing never went away. I strip the entire part that I made, down to bare metal, brass, and start all over. Same exact problem occurs on the same part of the one brass area. Yet, all the rest of the brass that is a part of this modification has taken the paint very well. Any ideas ? Thanks.
|
|
Rank: Advanced Member Groups: Member
Joined: 4/3/2003 Posts: 2,070 Location: Rockford,IL.
|
Could be a number of issues. Sand the area, clean the area with Acetone or Alcohol (not booze, HaHa). Humidity and moisture greatly affect spray paint cracking. Paint thickness along with product compatibility can cause the problem also. I let the primer (Rustoleum) completely dry overnight before I apply the top coat. Good luck, hope this helps.
|
|
Rank: Advanced Member Groups: Member
Joined: 8/12/2002 Posts: 851 Location: New York
|
kcmtoys wrote:Could be a number of issues. Sand the area, clean the area with Acetone or Alcohol (not booze, HaHa). Humidity and moisture greatly affect spray paint cracking. Paint thickness along with product compatibility can cause the problem also. I let the primer (Rustoleum) completely dry overnight before I apply the to coat. Good luck, hope this helps. Thanks very much for the reply and ideas!
|
|
Rank: Advanced Member Groups: Member
Joined: 8/27/2002 Posts: 4,827 Location: New Jersey
|
Clean with Acetone or Alcohol BEFORE you sand !!! Sanding will drive the contamination further into the substrate.
|
|
Rank: Advanced Member Groups: Member
Joined: 12/2/2013 Posts: 72 Location: California
|
These are the steps i would take:
1: Sand down the parts in all the ares. 2: Wash the parts with soap and rinse in hot water 3: Wipe the parts with alcohol 4: Warm up the parts with the heat gun or a hair dryer 5: spray very lite coat and walk away for 10-20 minutes 6: Apply another very lite coat and walk away for 10-20 minutes 7: Apply final coating
Hope this helps
|
|
Rank: Advanced Member Groups: Member
Joined: 8/12/2002 Posts: 851 Location: New York
|
Thanks everyone for your advice.
|
|
Guest |