new park over old park?

RavenTai · July 24, 2002, 20:18

well finally got my sandblaster going to day and found out I got to fine of glass bead. I asked for the equivelant of 220 and the sales guy gave me a bag of #8.

it works verry well on dirt, paint, rust, and old worn park, but barly puts a dent in the park "under the hand gaurds" (barrel gas tube gas block) and the new imbel reciever

now that this tugh park is clean no rust no dirt can I park over it? (it will be mek'ed just before to remove oils) or will it be blocky or worse yet not take? should I go back and get a courser glass bead or AL-OX?

any body try this before what happened?

Sophicles · July 24, 2002, 20:38

Make sure you have enough air pressure (between 60 and 70 lbs)going to your blast gun. Also Im not sure on the grade/grit of your glass beads. I use "blasting sand" which gives a little rougher finish. HTH

RavenTai · July 24, 2002, 20:53

I had heard that if the pressure is to high U would break the beads so I started @ 40 psi and that was not verry effective at all so I bumped it to about 60 static, dont know what is is when the gun is running (cant see the gauge from the cabinet) prolly bumps down quite a bit, tomorro I will try a higher pressure

the other problem in my punny craftsman 5 HP compressor has a hard time keeping up I have to stop often to let it catch up

Sophicles · July 25, 2002, 00:06

I didnt answer your original question...sorry. If the old park is in good shape you could leave it. However my personal preference is to get it all down to the white then park it. That way it will all match.

RavenTai · July 26, 2002, 15:32

well higher presure (80 psi) and longer dwell time did it thanks for the sujestion now I just gotta keep them from rusting til my new locking sholder gets here

gunsmith_tony · July 26, 2002, 15:35

I've tried it a few times. Never got good results. Best to blast off the old and start a-new.

Tony. · July 26, 2002, 16:41

Quote:

Originally posted by gunsmith_tony
I've tried it a few times. Never got good results. Best to blast off the old and start a-new.

Did the new park stick? What if you were parking to use as a base coat for a bake on finish?

Sophicles · July 26, 2002, 16:48

Parkerizing will not "stick" to old park since it is an "etching" process...nothing to etch.

Quote:

What if you were parking to use as a base coat for a bake on finish?

NOw you're talking! That is a tough as nails finish if done properly and comes highly recommended by many smiths.

Offctr · July 26, 2002, 23:00

After re parking my HK clone I still did not like the look and gave it a coat of alumahide II bake on and compared to how it went over bare metal it came out much more scratch resistant and tough that finish is bulletproof now -no pun intended. Paint over park is a good way to go.

July 24, 2002, 20:18	#1
RavenTai Registered FALaholic #: 6719 Join Date: Jun 2002 Location: Newnan GA Posts: 55	new park over old park? well finally got my sandblaster going to day and found out I got to fine of glass bead. I asked for the equivelant of 220 and the sales guy gave me a bag of #8. it works verry well on dirt, paint, rust, and old worn park, but barly puts a dent in the park "under the hand gaurds" (barrel gas tube gas block) and the new imbel reciever now that this tugh park is clean no rust no dirt can I park over it? (it will be mek'ed just before to remove oils) or will it be blocky or worse yet not take? should I go back and get a courser glass bead or AL-OX? any body try this before what happened?

July 26, 2002, 23:00	#9
Offctr Registered FALaholic #: 3326 Join Date: May 2001 Location: PA Posts: 1,228	After re parking my HK clone I still did not like the look and gave it a coat of alumahide II bake on and compared to how it went over bare metal it came out much more scratch resistant and tough that finish is bulletproof now -no pun intended. Paint over park is a good way to go. __________________ The 2nd Ammendment -The Original "Homeland Security" Act !

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July 24, 2002, 20:38	#2
Sophicles Registered FALaholic #: 976 Join Date: Sep 2000 Location: NC Posts: 1,503	Make sure you have enough air pressure (between 60 and 70 lbs)going to your blast gun. Also Im not sure on the grade/grit of your glass beads. I use "blasting sand" which gives a little rougher finish. HTH

July 24, 2002, 20:53	#3
RavenTai Registered FALaholic #: 6719 Join Date: Jun 2002 Location: Newnan GA Posts: 55	I had heard that if the pressure is to high U would break the beads so I started @ 40 psi and that was not verry effective at all so I bumped it to about 60 static, dont know what is is when the gun is running (cant see the gauge from the cabinet) prolly bumps down quite a bit, tomorro I will try a higher pressure the other problem in my punny craftsman 5 HP compressor has a hard time keeping up I have to stop often to let it catch up

July 25, 2002, 00:06	#4
Sophicles Registered FALaholic #: 976 Join Date: Sep 2000 Location: NC Posts: 1,503	I didnt answer your original question...sorry. If the old park is in good shape you could leave it. However my personal preference is to get it all down to the white then park it. That way it will all match.

July 26, 2002, 15:32	#5
RavenTai Registered FALaholic #: 6719 Join Date: Jun 2002 Location: Newnan GA Posts: 55	well higher presure (80 psi) and longer dwell time did it thanks for the sujestion now I just gotta keep them from rusting til my new locking sholder gets here

July 26, 2002, 15:35	#6
gunsmith_tony Registered FALaholic #: 6564 Join Date: May 2002 Location: Atlanta, GA Posts: 2,521	I've tried it a few times. Never got good results. Best to blast off the old and start a-new.