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73-87 Chevy _ GMC Trucks => Body, Glass & Paint => Topic started by: 1984k30 on August 20, 2009, 03:12:53 pm

Title: using body filler
Post by: 1984k30 on August 20, 2009, 03:12:53 pm

Well I finally started to do needed body repair on my truck.  I went to the paint shop to get filler and primer.  I am not a body man but the salesman said that you should put the filler over a primer not bare metal.  Is this the proper way to do it.  I am worried it will not stick as good to the primer vs bare metal.  He did sell me a epoxy primer to put on the bare metal then put on the filler then he sold me a 2k urethane surfacer to cover the filler with.  just want to know if I should do it that way.  I forgot to ask him about a sealer because truck was painted before but I have no clue with what kind of paint.  Do I have to spray the whole truck with a sealer prior to base coat.  Also I got ppg shopline products anyone ever use these before? 

Title: Re: using body filler
Post by: Blazin on August 20, 2009, 05:06:38 pm

I have seen on TV shows they put filler over an epoxy primer.  ???
I personally learned years ago that you never put fill over anything but bare metal that has been ground with 24 grit. As far as sealer. As long as the paint is older it shouldn't bother. Thats kind of a judgment call.

Title: Re: using body filler
Post by: zieg85 on August 20, 2009, 06:20:39 pm

Dried but fresh epoxy, less than a week old works great.  Usually after a week epoxies need sanded for a good topcoat bond to happen.  It is a very common practice in the machine tool industry to epoxy prime first especially when going into a corrosive environment.  My $.02

Title: Re: using body filler
Post by: baddogg79 on August 23, 2009, 09:08:19 am

yep, metal work first, epoxy prime next, plastic work, i then epoxy prime again to cover the plastic and and bare metal from sanding. Then urethane prime. The filler bonds better to the epoxy primer than the metal.

Title: Re: using body filler
Post by: 1984k30 on August 23, 2009, 03:33:51 pm

I am going to try it both ways.  One bedside repair with epoxy and one without and see if one goes before the other.  I have asked a few people and see to get answers both ways.  If my repairs get me 5 good years then either way I am happy.  I worrie more about how the metal looks on the inside of the bedside.   There are patches of rust here and there and there really is not a good way to fix them.  I am sure this is the weak link in my repairs.