SPI Epoxy Primer as Final coat (no 2k primer)

P

pa2000xxxx

Need quick advice. I know I can spray 2 coats of SPI epoxy primer, wetsand next day and then top coat with SS or base/clear; however, is high build/2k necessary? This will be on new repop panels (fenders) and I'm not looking for a showcar finish. Am I going to be disappointed at the final product?
 
Thats a hard question. Without seeing what your first blocking of the epoxy looks like, I dont think there is an answer to your question. If you spray two coats of epoxy and it blocks out with no sandthrus to the ooriginal surface and no low spots, you should be happy with the final product. If you have highs and lows in the epoxy after you block it, they will show in the final finish. How are you preparing the surface prior to the two coats of epxoy?
 
Outlaw said:
Thats a hard question. Without seeing what your first blocking of the epoxy looks like, I dont think there is an answer to your question. If you spray two coats of epoxy and it blocks out with no sandthrus to the ooriginal surface and no low spots, you should be happy with the final product. If you have highs and lows in the epoxy after you block it, they will show in the final finish. How are you preparing the surface prior to the two coats of epxoy?
Click to expand...

Prepping the EDP panels with 80 grit DA sander
 
The only way to know for sure IMHO is to use a guide coat. If you can block sand the guide coat off and not see any metal you should be good to go. That being said, I like the filling properties and ease of sanding 2k primer offers.
 
'68 Coronet R/T said:
The only way to know for sure IMHO is to use a guide coat. If you can block sand the guide coat off and not see any metal you should be good to go. That being said, I like the filling properties and ease of sanding 2k primer offers.
Click to expand...
I love SPI products, but is their 2K worth the wait (mail time)? I've used a 2k locally a year ago and it was frustrating. Also, how do you decide between the 2k Primer and the 2K high build? I know listed mil coverage for SPI but not sure if more is better. I'm guessing the 2K is probably easier to spray than the 2K high build.
 
pa2000xxxx said:
I love SPI products, but is their 2K worth the wait (mail time)? I've used a 2k locally a year ago and it was frustrating. Also, how do you decide between the 2k Primer and the 2K high build? I know listed mil coverage for SPI but not sure if more is better. I'm guessing the 2K is probably easier to spray than the 2K high build.
Click to expand...

There's no way to un-reduce the regular 2K and make it thicker if you're not happy with its filling properties.

The HB you will definitely find it thick enough and you can fine tune it with reducer if you like, so there's more room for adjustments.

The best value and performance may be with the 2K Turbo though, awesome primer IMO.
 
If the part is nice, there's no reason why two coats of epoxy can't provide an excellent foundation for paint, in fact it's an ideal one, just not one that will straighten out any problem areas.
 
I agree with crash. Epoxy 'can build' as I have done it for years and 'if' your bodywork is that lacking,might want to rethink your procedures.
You paint on your Foundation.
Think about IT......
 
I can only wish I was good enough to use only SPI Epoxy to build a finish that will "block to perfect". I need filler and and 2k primer.
 
Is the "wait" worth using SPI? Its free shipping and the very best technical support service I have ever witnessed. I just plan ahead and order it early enough to stay ahead of my needs. So to me, the answer is a definite "YES".
 
Outlaw said:
I can only wish I was good enough to use only SPI Epoxy to build a finish that will "block to perfect". I need filler and and 2k primer.
Click to expand...
Most people need filler, but no one needs 2K urethane if there is enough time. The advantages of urethane primer are that it builds with fewer coats and dries fast. But with time and patience, SPI epoxy serves outstandingly as a primer-surfacer, it just takes more coats. The nice thing about it is you can go back a step and skim some polyester putty on it without any worry, it's made for that, unlike urethane.
 
Is urethane same as poly urethane? High build products like slick sand are a sprayable polyester filler. Are those like filler or urethane?
 
Poly primers like slick sand are a really heavy build primer, spray on body filler if you will. When I use a product like that I would suggest to seal it with epoxy before base coat
 
You must log in or register to reply here.
Back
Top