My car was first shot with HOK DTM KD2000, then a couple good coats of poly primer. The car was blocked and now has a couple bare metal spots - should it be re-shot with a dtm primer(KD2000)? or will it be ok to just hit it with another coat of poly? or both? Although I appreciate everyones input, I'm looking to get advice from those who do this for a living. Thanks again.
It really depends on the size of the bare metal spots. If they are small (coin sized) you can get away with it. If they are as large as a hand then they need more primer. Sealer covers a lot but you probably should prime it again if you want a nice job.
By looking at your pic. I would shoot a light coat of sealer over the metal spots, then a good wet coat of primer over the entire car, then block it again. Is that a 41.
yeah for sure gonna prime again, be was unsure if I should use the direct to metal primer 1st before the poly. sounds resonable. yeah 41- Thers a link to the build here somewhere. Thanks.
Those bm spots are high spots thats why you broke thruwhen blocking.Sounds like you got more bodywork to do before priming.
Poly Primer should only be applied over Epoxy Primer or bare metal. I "think" that the HOK primer is urethane. If so, I'd be worried about the Poly coming off of the Urethane Primer, especially if you went wet on wet with the Poly over a Urethane. Jut my 2 cents, but I've fixed these types of nightmares after the fact !! Best wishes. VOODOO R&C
not sure about hok anything cause it reacts diffrently to other materials, unless you use the same reducer. there is nothing wrong with spot priming your spots Lightly!! as long as the primer in the area is at its finish block stage, like (320) or (400) i would lightly spot prime the area so i had no break throughs and finish sand and epoxy and shoot! but if is very small blow throughs, epoxy seal it and shoot man!! good luck!
IMO, just looking at the pic, I have to think that there is more blocking in your future. The SIZE of the sand through areas says "not yet", I know that was not your question, but I decided to add my .02 anyway...
small spots of metal are fine, but larger ones should be hit with some dtm primer. Im not a big fan of poly primer but, in this case i would just go ahead and shoot your bare metal spots with dtm primer and then hit it again with your polyester primer. good luck
Yeah its only sanded to 150 now, so at least a couple more rounds of blocking are coming- I guess my question wasnt clear, I guess I was looking to see if its safe to apply poly primer to bare metal spots directly, or is it best to hit it with dtm primer 1st.
If your breaking thru to bare metal you must have high spots. i would check your metal work before proceeding with any primers. Pro spray has a nice dtm primer and sands really nice. i would use a urethane primer if it was me. good luck
Hey, Polyester primer to bare metal is pretty much a major no-no! I'd go with your DTM in the spots you blew thru, then your poly, if that's what's on the job now, and seal, prior to top coating with an epoxy. " Humpty Dumpty was pushed "
Give the high spots a little tappy tappy with a hammer then re-prime. Block those areas again. As someone mentioned , SHoot it with primer again ad block it again with a guide coat..Last thing you want to do is have to do it ALL again. Paint sucks I know I am in the middle of it right now. Good luck man.
dont use poly primer over bare metal. Stick with kd2000 its very good primer. Dont change primers stick with one product if something fails you know what it is. I like useing epoxys the best over bare metal and good 2k dtm primers are very good and most you can reduce down to make a non sanding sealer if you have cut throughs like you do. Billy
I've seen people use poly primer here in England and they always seem to get problems, it sucks up moisture like a sponge. the only time i ever use it is on a fibreglass body and then i epoxy prime first and get it sealed as soon as i've finished dry sanding it. I epoxy primer all my bare metal, then do my fillerwork, then hi build primer, I've not had any problems for the last 15 years since i 've been doing it that way.
Might be too late now, but if you are using HOK products, why not just use their KP epoxy primer? OK to use over bare metal, it's a good filler/surfacer primer, sands pretty easy, and also acts like a sealer. If not, I agree with most here, use your DTM for large bare spots before proceeding with more poly.
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