Primer sealer question.

General Discussion. Make yourself at home...read, ask and answer!



Settled In
Posts: 18
Joined: Mon Jul 10, 2017 10:38 pm

Country:
USA
PostPosted: Thu Jul 11, 2019 11:56 pm
Little history, (first paint job/solid red) 1946 Int K1 Pick-up. All body part were blasted, epoxied, straightened, 3 coats of high build (PPG Advantage 325), flattened, Primed again 3 coats 4:1:1. And now I think I'm ready for final sanding.

Started on the front, nose/grill today, and boy this sanding is bit easier on the arms, seems I'm just knocking down orange peel. All seems good, but I have a lot of nooks and crannies around top of grill and have a few burn throughs to metal. Kinda stuff that would be spotted with primer. (or do I have to do freakin epoxy again...primer ok?) And tiny areas that look like tiny fingerprint little rough areas. This stuff is on the upper part of grill gaps, above the fold.

Some of the little rough area I could sand a little more and try to get in there, but was wondering if it would be a good idea to use my primer (PPG Advantage 325) as a sealer (4:1:2) to help with areas like that to fill in and for the sanded trough areas. But all of the flat front area of the grill looks great and supper smooth (tried the 320/400 wet).
Am I asking for more sanding all over again with the sealer or is it so reduced that its super smooth and good to go no sanding needed after? Or is a red scotch bright wipe down after before color?
Or do I just spot fix them and move on to easy fenders... Just thought the one coat of sealer would help with my novice sanding...
P.S. Also what about the back of grill, just have primer over spray and epoxy do I need to rough that up with a red scotch bright and spray it (color) and forget it (back side anyway?)...

Pic of grill (before any work).
DSC_7224-min.JPG
Attachments
DSC_7252-min.JPG



Top Contributor
Posts: 4439
Joined: Tue Sep 16, 2008 1:17 pm
Location: Pahrump NV.
Country:
USA
PostPosted: Fri Jul 12, 2019 5:57 am
6 coats that's a lot i hope most of it is on the floor now though?

Bare spots yes redo epoxy and Primer unless your primer is a DTM (direct to metal)
Cant tell you where or what to do at this stage cant see it?

I use a Dry Guide coat on my Primer coats to tell me when to stop sanding or add more filler myself.
https://www.3m.com/3M/en_US/company-us/ ... 475&rt=rud
Dennis Barnett
A&P Mechanic, FCC General radio Telephone Operator
Line Maintenance A&P Mechanic and MOC Tech specialist.



Settled In
Posts: 18
Joined: Mon Jul 10, 2017 10:38 pm

Country:
USA
PostPosted: Fri Jul 12, 2019 10:05 am
Yes most is on the floor. First primer round did not have reducer so it was pretty rough and had to sand most of it down... Here some pics today, too dark last night. I'm also using dry guide coat as well. And just checked Atv 325 is direct to metal.

DSC_9911-min.JPG
DSC_9910-min.JPG
DSC_9909-min.JPG



Top Contributor
Posts: 4841
Joined: Tue May 19, 2009 7:10 pm
Location: OREGON COAST
PostPosted: Fri Jul 12, 2019 12:48 pm
Dennis is right for the ultimate protection spot with the epoxy, but for your everyday job your DTM primer will work just fine. good deal your using the dry guide coat it works great ether dry or wet. i don't think i would use the sealer it really isn't necessary and it really isn't meant to be sanded. also that grill looks quite complex sand as much as you can. then you can improvise with your sand paper, like cutting small strips and gluing them to a stir stick to reach areas your fingers can't. when you get done with all your sanding with the paper go over the areas you couldn't get with a red scotch brite pad. you didn't say what type of paint your going to use? one thing for sure that grill is going to be difficult to spray and get a nice smooth coverage on all of it . for the back side use the scratch pad then then paint. the sealer would be maybe useful on the back side if you rub through, but your probably going to want to shoot it all at one time.
Jay D.
they say my name is Jay



Settled In
Posts: 18
Joined: Mon Jul 10, 2017 10:38 pm

Country:
USA
PostPosted: Fri Jul 12, 2019 2:03 pm
It will BC/CC Red paint job. Prob going to do a spray out test next week of the original color, too see if I like it. Still torn on original color vs a Jeep Firecracker Red almost looks like a modern version on the International 46 red. Just worried the Int red looks too orange'ish. And whether a modern color will look weird on older truck, not custom at all.
http://paintref.com/cgi-bin/colorcodedi ... &sname=Red
http://oldihc.org/phpBB3/download/file. ... &mode=view original color.
Leaning more towards original since this thing is going back original...
No single stage. (SS Maybe on running boards no sure. They are black)

Thank you. Yes the guild coat is great, it's a must. Too easy to get snow blind in the primer without it...
Question, if I were to spot fix, should I mix it at 4:1:2 as sealer, so its smoother?

And if I do the back maybe tape off the front so no over spray. On the back now it's just a nice heavy coat of epoxy with one light coat of primer.

If its super smooth to spray, the sealer and no sanding, that seems like a easy thing to do to the back. Just RSB and seal.

And with under the hood?, just rough up the epoxy with RSB and color. It's all epoxy under there no primer. (original truck not show) I know I could seal under there but I figured I can just go over the epoxy after scuffing.

rambling here... unless (never sprayed sealer) the sealer goes on like butter and no sanding. I'll try it after the grill. Seems like a win win using sealer? I guess unless you spray it on badly...



Top Contributor
Posts: 4841
Joined: Tue May 19, 2009 7:10 pm
Location: OREGON COAST
PostPosted: Fri Jul 12, 2019 10:41 pm
for your sand throughs I would just use your regular DTM primer that way you can sand it smooth and get any overspray smooth out. heres my thoughts on painting the grill. I would hang it up or suspend it some how. tie the bottom down to something heavy on the floor other wise its going to be swinging all over the place making it very difficult to spray. I would shoot the back side first then come around and do the front. what's going to be your problem is the grill openings the horizontal part of the bars that go back towards the radiator. your probably not going to get full coverage on them from one side, your really going see this with the clear. if you try and cover it from the front your going to get to much build on the bend and its going to run. that's why I would spray the bars from the back side first, you should be able to get most of it. then you'll just have a small narrow strip to finish on the outside when you spray the vertical parts of the bars.
hope this helps
Jay D.
they say my name is Jay



Settled In
Posts: 18
Joined: Mon Jul 10, 2017 10:38 pm

Country:
USA
PostPosted: Sat Jul 13, 2019 9:50 am
Thanks for all your help!

Return to Body and Paint

Who is online

Users browsing this forum: Google [Bot], Majestic-12 [Bot], simso and 12 guests

cron