RUST

stratos · Sep 1, 2009

bill308 said: ↑

Osmosis or microblisters on a fiberglass car is fixable. This is a common problem on fiberglass boats that spend a lot of time in the water, mainly below the waterline. On a car, it is often caused by painting over fiberglass that has too much moisture content. The glass must be dry. Dry heat will drive the moisture out prior to surfacing and painting.

To fix it will require stipping to the gel coat, a good sanding to remove the blisters, and thorough drying before begining the surfacing and painting process. If one is really paranoid, there are various marine sealers (barrier coats) available, Interlux 2000 I believe is one, that are epoxy based and specifically designed to prevent this from happening. The barrier coat is applied to the prepared gelcoat prior to surfacing.

I hoe this helps.

Bill
Click to expand...

On cars it usually occurs when they have been stored in a humid environment or if improper primers have been used. In both case when "repaired" it usually comes back a few years later.

f308jack · Sep 2, 2009

Look also for cracks at the bottom of the A-pillars, and the engine lid right at the back where it flips up (spoiler) on the edges.

greg246 · Sep 2, 2009

bill308 said: ↑

Osmosis or microblisters on a fiberglass car is fixable. This is a common problem on fiberglass boats that spend a lot of time in the water, mainly below the waterline. On a car, it is often caused by painting over fiberglass that has too much moisture content. The glass must be dry. Dry heat will drive the moisture out prior to surfacing and painting.

To fix it will require stipping to the gel coat, a good sanding to remove the blisters, and thorough drying before begining the surfacing and painting process. If one is really paranoid, there are various marine sealers (barrier coats) available, Interlux 2000 I believe is one, that are epoxy based and specifically designed to prevent this from happening. The barrier coat is applied to the prepared gelcoat prior to surfacing.

I hoe this helps.

Bill
Click to expand...

f308jack said: ↑

Look also for cracks at the bottom of the A-pillars, and the engine lid right at the back where it flips up (spoiler) on the edges.
Click to expand...

thanks. Appreciate your input

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stratos Formula Junior

f308jack F1 Rookie

greg246 Two Time F1 World Champ Owner Silver Subscribed

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greg246 Two Time F1 World Champ
Owner Silver Subscribed