Problems with spray paint

[Mike Waterhouse 1Participant @mikewaterhouse1]

I wonder if anyone has had this problem.

Recently I've sprayed 2 models built over the winter months and had the same problem with each.

I prepared the surface and made sure they were dust and grease free, then sprayed three coats of grey primer lightly sanding with wet and dry between coats, left them overnight to make sure the surface was dry then applied the finishing colour as before. the boat was left for 2 weeks out in all this glorious warm weather to harden off, upside down on the workmate.

I put it on the stand which has foam rubber to avoid scratching, to finish the decks and mast mounts etc but when I tried to lift it from the stand the thing was stuck fast.

The paint is Halfords spray cans and no one can offer any help from their shop..

I'll have to rub it down again and do a re-spray but how long before the stuff sets rock hard.

I've done other boats the same way and not had problems like this…..Is it me?

I'd welcome any advice you chaps can offer.

Regards

Mike.

[Mike Waterhouse 1Participant @mikewaterhouse1]

I thought it was all going too easy.

[Paul TParticipant @pault84577]

Hello Mike

Assuming that you have explored the options of incompatibility between base / top coat and that you are experienced enough to avoid spraying thick coats then only two options remain.

Firstly there is the possibility of a manufacturing error with the Halfords product.

Secondly, and more likely, is a chemical reaction between the protective foam rubber (or the foam rubber adhesive) and the paint.

Paul

[Bob Abell 2Participant @bobabell2]

Hello Mike

I have often had this problem with paint jobs several years old!

Many a time a model was stuck to the foam rubber!

I suspect that the sticky stuff oozes through the foam and sticks to both sides!

Talcum powder may help to reduce the stickiness?

Bob

[Colin BishopModerator @colinbishop34627]

I think the others are right, it is almost certainly a problem with the foam rubber, I have had the same experience myself in the past. Possibly not all types of foam rubber react like this but some definitely seem to.

Colin

[ashley needhamParticipant @ashleyneedham69188]

I stick some felt to the foam rubber, adds colour and stops the sticking (of the boat that is)

I dont find a problem with the top coats sticking to the foam, only in the sense it makes then difficult to lift! but foam does attack paint that is not fully dry (I would give it a week at least)

Ashley

[Mike Waterhouse 1Participant @mikewaterhouse1]

Good morning all, thanks for the input.

The foam I used is the split tube type used to lag pipes, it isn't glued to the support frame so no seepage of chemicals to the paint.

I've used slices of car innertube before with great succes but wanted something that looked a bit more proffessional this time.

I had thought of some sort of felt so may explore this avenue, has anyone experience with this alternative?

Regards

Mike

[ashley needhamParticipant @ashleyneedham69188]

IF you make your stand so that the supports fit very well, just allowing room for some felt, I think this would look very proffessional. Use evostick or something..BUT WAIT FOR THIS TO DRY properly or it will strip the paint right off!!

You can get thick felt for a bit more protection, and of course it comes in various colours. I usually paint my stands a blue of some sort…boats sitting in the water and all that.

A stand whereby the boat sat in blue tinted acrylic at the waterline would look very cool.

Ashley

[Kimosubby ShipyardsParticipant @kimosubbyshipyards]

Mike and all,

I've just discovered the exact same problem, but I used split food safe plastic tubing to line my stand. I had sprayed and varnished a yacht hull with acrylics all round. I left the hull upturned for two weeks before setting back into the stand. Yesterday I started to add some deck fittings – the hull was "stuck"to the split tubing – I've used it before with no problems. The only difference would be the temperature, over the last two weeks its been in the mid 20's here, so I've put it down to that.

I've now changed the stand "soft zone" to self adhesive felt pads, just hope they're better. 3 short lengths about the hull shape.

I've used the insulation material refered to before (the grey stuff) and whilst it seemed ok with hardened, in use boats, prolonged contact allowed it to stick in places.

We'll see what happens with the felt. Normally with yacht hulls we use a canvas strap fore and aft on a folding wooden stand and no problems – though you do get the indenture of the weave over time in the hull surface.

Kimosubby.

[MzeeParticipant @mzee]

I've also had this problem so for the past few years I've steered clear of foam rubbers of any sort. I tried cutting strips of thin cork from tiling sheets and found that it worked well enough but I still had adhesion problems with some paints. Now I use strips cut from carpeting tiles – either the self-adhesive sort or stuck down using a contact adhesive. Works a dream and comes in any colour you want and in a variety of thicknesses. One caveat – don't let contact adhesive make contact with your paintwork!.

Robin

ps. The wife still doesn't know where the spare carpet tiles went

[ashley needhamParticipant @ashleyneedham69188]

What we seem to be talking about here is using something natural for the paint-stand contact area, rather than something man made…plastics of some sort.

Wool (felt), cotton or cork. Rubber is a bit iffy due to its propensity to be affected by solvents.

Perhaps we should make small docks for them, and let them float??

Ashley

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