Spraying TVR's

[daza]

Hi,

I've stripped the vixen bonnet, done the repairs and re-applied new gel.

I've sprayed the first coat of two pack high build primer and now need to rub back and get rid of the dinks. Can anyone recomend whether I should be rubbing back by using wet n dry with fairy liquid? or keep it dry to rub back?

Thanks

Darren

[astacus]

Not sure if this applies to glass fibre, but I expect it does. I have found that rubbing back with wet and dry using water badly affects the subsequent top coat due to water penetratong the undercoats. This water doesn't all evaporarte off and subsequently becomes trapped in the undercoat. When you spray the top coat on top it then either a) discolours due a reaction of the water with the pigment or b) blisters as the water evaporates in hot weather under the top coat.

I would not recommend using water at all in prep.

Not an expert, just had a bad experience.

Astacus

[Notanutter]

Check out this recent thread on this forum "Stripping!!" which has some good advice.

[daza]

Tim,,

Cheers,,

I'll wet and dry it, havent had much success with dry only....
and yes,,

and I'll make sure the panel is bone dry before spraying any further..

Thanks

Darren

Edited by daza on Wednesday 7th March 10:18

[JR]

daza said:

I've stripped the vixen bonnet, done the repairs and re-applied new gel.

For those that don't know: remember to include new tissue in the top layer of fibre glass ( the commonly called gel coat. )

[daza]

Hi JR,

Thanks for the advice...

I've already DA'd the crazing out and lay'd fibreglass cloth on (which I believe is better than tissue) and then added gel on top of that again.

After putting the first coat of hi-build primer on the results are already suprisingly good.

Darren

[heightswitch]

What products have you used Darren?

Neil.
(Shortly to get dusty and start coughing just like you)

[JR]

daza said:

Hi JR,

Thanks for the advice...

I've already DA'd the crazing out and lay'd fibreglass cloth on (which I believe is better than tissue) and then added gel on top of that again.

Glad to hear that your car appears to be fine. The matting ( fibreglass cloth? ) gives the panel it's strength. The tissue is badded into the final layer during stippling and helps prevent both crazing from light knocks later in life and the spread of any crack or undue loading.

[daza]

pomohon said:

Please help me understand what you are decribing as ''gelcoat''.I m getting the impression that you are talking about what we call resin.|Im thinking of the two part product that we use to coat molds before mat,cloth or chop gun is used to lay up.It is also used to seal repairs after mat or cloth and resin is applied in repairs.Standard gelcoat come is hery hard to sand. For future reference,Ecklers Corvette supply makes a terrific spray gelcoat(you need a pressure pot for this product)that sprays well and is a lot easier to sand.DJ

Tim,
Your right,, and a spray on gelcoat maybe a better option again... because Iv'e had to apply layers and sand in between.. I would have thought that the spray option would give a more even coating with less waste..

Neil,
I've been using MW - Gel resin, solution, pigment and activator.
but I recently stumbled on a product which only requires activator.. will post details when I get home.

Darren

[superpip]

hi daza i been doing the same as you with a friend and i am sure that u are doing the fibreglass gelcoat and primer correctly just make sure that u buy enough measuring cups and rags and also very impotant to keep garage clean the car will look good when finished 2010 by for now