[rusty428cj]

I asked about the rust under vinyl top question. I have a 20 year old who is restoring his car that works for me. He will be doing everything himself with mine and your guidance. He has a 69 Mustang coupe that in some places the roof looks like swiss cheese. He has to fix this roof, very limited budget. After he strips all the old fiberglass off he will epoxy prime using SPI epoxy and than fill the holes. Which of the above products would you suggest he use?

[BarryK]

I would vote for the Everglass or Kitty hair.
Not even sure it would make a difference but I would use whatever one is the finest or smallest fiber like Duraglass for ease of use.

[baddbob]

I agree with Barry, Everglass would be top of the list IMO, USC duraglass and Marson's Marglass are also comparable. Kitty hair, tiger hair, long and strong, and similar are for fiberglass work IMO or used car boogerups.

Evercoat's newer Glass Lite is supposed to be basically the same as their Everglass but much easier sanding, I've used it on a few jobs in repairs where I'd normally have used everglass and do like how it sands easier-almost comparable to regular fillers.

Metal to metal is junk IMO, I've seen too many failures with this product to ever consider using it again or recomending it. The vendors in this area quit stocking it years ago--nobody around here uses it.

Without replacing the rusted metal you're going to lose some lifespan with the repair. If you're filling the holes be sure to coat the backside with something to seal the inside from the additional oxygen needed for corrosion to continue. 3M's rustfighter or any type of cavity wax would be the best IMO. Epoxy could be applied to the interior in areas that can be accessed for cleaning- there is no sense in applying epoxy to any surface that can't be prepped properly-coatings like the rustfighter contain wax and mild petroleum solvents that will saturate into the surface of rust and cling forming a waxy coating effectively sealing the surface from oxygen.

[lowbux]

i have used the kitty hair on various applications, one recommendation i would make is to clean the backside really well then use fiberglass resin with some thin glass mat followed by another coat of resin once first layer is hardened. then move to the top side and you will have a good backing of a like product to which long strand kitty hair can be applied(thin layer), follow this with a layer of short strand kitty hair. let harden then sand to approximate shape and finish off with a skim of body filler. once primed and sealed like this you will have a repair which will last a long time.
in any repair ensuring the areas are very clean and treated with metal prep is vital to a good job and proper adhesion.

[69 widetrack]

You have a 1968 Mustang Coupe...a desirable car...any reason you don't want to fix it properly by replacing the rust with metal instead of fiberglass. If it we're my car it would be repaired properly or not repaired at all. In my opinion fiberglass, either out of a can or coming off of a roll is not the repair a 1968 Mustang Coupe deserves and you may be doing more damage to a collectable car than you realize. I understand that you have a limited budget, save your money and do it right. Even if you put a vinyl top back on, you'll always know what's underneath and you can expect it to bubble in the future and then it may be to far gone to repair it properly. I've seen it much to many times in the past.

Only my opinion.

Ray

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