You may remember my first post last fall asking a similar question. I was having issues with epoxy not feathering properly near areas that I had applied filler, this was on the body of my project car. In that case I had used a metal conditioner in several areas, and was advised to strip everything, neutralize and start over, which I did.
My current issue is on the front fenders that I primed and filled last fall, and just started blocking yesterday. Problem is the same as before. When blocking the filler and epoxy, I have areas that the epoxy seems to tear instead of feather. This is happening is areas close to where filler was applied, but also in areas where no filler was used at all.
Today I grabbed my air gun and in places where the primer won't feather, I can blow it right off, and using a scraper, it comes off easily. Other areas the scraper will not get under it.
The primer and activator were bought in 2014, kept stored in a 60F storage area, and never opened until late 2015 and and I used the last of it in late 2016.
My prep was:
-cleaned fenders before starting with jobber (Pro-Form) W&G remover (spray on, wipe off with wiping cloths)
-sanded with 80 grit on DA to bare metal
-no acid or metal conditioners were used!
-cleaned fenders with SPI 700 (spray on, wipe off with wiping cloths)
-let dry for 2 hours
-mixed SPI epoxy 1:1, induced for 30 minutes
-sprayed 1 wet coat, waited 30 minutes, sprayed another wet coat
-waited 4 days, then applied filler to a few areas
-garage, primer, and fenders were 72F when sprayed, and temp kept at 72F for one week after spraying. Temp never went below 60F since I sprayed them last fall.
-fenders looked great after priming, nice gloss and no orange peel
I am at a loss as to what I am doing wrong? My only other experience with SPI epoxy is the second gallon I bought this spring, I sprayed it on my doors a few months ago and any areas I have sanded through while blocking feather nicely and I have no issues. My prep is the same as what I did with my fenders.
Please help!
Thanks
Michael
My current issue is on the front fenders that I primed and filled last fall, and just started blocking yesterday. Problem is the same as before. When blocking the filler and epoxy, I have areas that the epoxy seems to tear instead of feather. This is happening is areas close to where filler was applied, but also in areas where no filler was used at all.
Today I grabbed my air gun and in places where the primer won't feather, I can blow it right off, and using a scraper, it comes off easily. Other areas the scraper will not get under it.
The primer and activator were bought in 2014, kept stored in a 60F storage area, and never opened until late 2015 and and I used the last of it in late 2016.
My prep was:
-cleaned fenders before starting with jobber (Pro-Form) W&G remover (spray on, wipe off with wiping cloths)
-sanded with 80 grit on DA to bare metal
-no acid or metal conditioners were used!
-cleaned fenders with SPI 700 (spray on, wipe off with wiping cloths)
-let dry for 2 hours
-mixed SPI epoxy 1:1, induced for 30 minutes
-sprayed 1 wet coat, waited 30 minutes, sprayed another wet coat
-waited 4 days, then applied filler to a few areas
-garage, primer, and fenders were 72F when sprayed, and temp kept at 72F for one week after spraying. Temp never went below 60F since I sprayed them last fall.
-fenders looked great after priming, nice gloss and no orange peel
I am at a loss as to what I am doing wrong? My only other experience with SPI epoxy is the second gallon I bought this spring, I sprayed it on my doors a few months ago and any areas I have sanded through while blocking feather nicely and I have no issues. My prep is the same as what I did with my fenders.
Please help!
Thanks
Michael