Using POR chassis paint

[Spathodus77]

Hi,

For the next round of chassis protection I'm going to use POR, I understand that this is unlike other paints and I want to make sure I'm going about things the right way before I start. My plan is:

1) Remove loose paint, rust and coating with wire brushes and white spirit.
2) Apply POR15 and leave overnight
3) Apply a second coat of POR15 and leave overnight
4) Topcoat to provide UV protection and leave overnight
5) Waxoyl

I really have two main questions; firstly I have to leave the POR overnight between coats because I shall be doing the job in the evenings, however the info on Frosts website states that the second coat should go on when the POR is still very slightly tacky (i.e. 4 hrs between coats). Will it be OK to leave it longer? if I leave it longer can I resolve the situation by making the surface of the first coat rough (i.e. sanding btween coats)?

Secondly, I've heard that POR can solidify quickly in the can inless stored correctly (thanks Sean). The recommended method was to drill a hole in the lid so that the amount needed can be poured out and block this with a self tapping screw between uses. If I do this how long does the POR keep without stirring? can I shake it before use instead of stirring? should I stir it before the first use and then put the lid on? or should I never take the lid off?

Simple things I'm sure, but I'm finding the whole situation a bit confusing

Thanks,

Ralph.

[GreenV8S]

Spathodus77 said:

The recommended method was to drill a hole in the lid so that the amount needed can be poured out and block this with a self tapping screw between uses.

Not heard that and I can't see it working. The recommended method is simply to put a layer of cling film under the lid when you replace it. This stops the lid gluing itself to the tin. I think the POR15 range includes a tie binder which can be applied on top of the first coat to enable additional layers to key onto it. I expect you could just roughen the surface instead to give it a key.

[trickjohn]

You need to get the second coat on within 4 hrs or if its still tacky but dry to touch, you can roughen the surface up for the second coat if time is a issue. Its a very thin paint and if the paint wells in any areas it starts to bubble up, so it needs to be painted on not chucked on. Tie sealer is used to seal of the Por 15 prior to a top coat. Its a very smooth finish. You need to keep an eye on temparature and humidity, there are good instructions on the Por 15 site, theres even a set of instructions for people who dont read instructions!.

I sealed my cans using 2 big woodscrews, started the hole with a nail and poured out what I needed to use, cling film would probably work also, but you need to pour out what you need to use as this stuff is hydroscopic and leaving the top off will effect the stuff, one bead of sweat completely ruins it. I swear by Por 15 but you will need to read the instruction on the Por 15 site.

Regards Sean

[clarenceboddiger]

Spathodus77 said:

Hi,
the info on Frosts website states that the second coat should go on when the POR is still very slightly tacky (i.e. 4 hrs between coats). Will it be OK to leave it longer?
Ralph.

I havent read the instructions for this product but on similar products it says something like " second coat within 4-5 hrs or after 5 days". I assume the paint needs time to cure before the 2nd coat, just wondering if there isanything similar with this product?

[pringli]

Morning folks, tie coat can be used between coats of por15 as well as to tie the chassis coat (topcoat)

[Spathodus77]

Thanks Guys. I read through the instructions on the POR 15 site and they were very useful. I think my revised process will be:

1) Degrease and clean with white spirit and wirebrushes.
2) Use POR metal ready, clean off and dry.
3) Apply POR 15 & leave overnight.
4) Lightly sand surface, apply POR15 and leave overnight to dry.
5) Lightly sand, overcoat and leave overnight.
6) Waxoyl

I'm going to 'suck it and see' if this works...

Ralph.

[trickjohn]

Try not to get any on your skin - if you do and it drys you will have to wear it off - about 10 days.

Sean

[Spathodus77]

I've got plenty of latex gloves and safety gear!

Ralph.

PS: This is not a come-on